diff --git a/dlls/urlmon/binding.c b/dlls/urlmon/binding.c
index 14f11a7b0f8..9f126feb89b 100644
--- a/dlls/urlmon/binding.c
+++ b/dlls/urlmon/binding.c
@@ -200,7 +200,7 @@ static void mime_available(Binding *This, LPCWSTR mime)
 static void stop_binding(Binding *binding, HRESULT hres, LPCWSTR str)
 {
     if(binding->state & BINDING_LOCKED) {
-        IInternetProtocolEx_UnlockRequest(PROTOCOLEX(binding->protocol));
+        IInternetProtocolEx_UnlockRequest(&binding->protocol->IInternetProtocolEx_iface);
         binding->state &= ~BINDING_LOCKED;
     }
 
@@ -342,7 +342,7 @@ static void create_object(Binding *binding)
 
     stop_binding(binding, hres, NULL);
     if(FAILED(hres))
-        IInternetProtocolEx_Terminate(PROTOCOLEX(binding->protocol), 0);
+        IInternetProtocolEx_Terminate(&binding->protocol->IInternetProtocolEx_iface, 0);
 }
 
 static void cache_file_available(Binding *This, const WCHAR *file_name)
@@ -862,7 +862,7 @@ static ULONG WINAPI Binding_Release(IBinding *iface)
         if(This->callback)
             IBindStatusCallback_Release(This->callback);
         if(This->protocol)
-            IInternetProtocolEx_Release(PROTOCOLEX(This->protocol));
+            IInternetProtocolEx_Release(&This->protocol->IInternetProtocolEx_iface);
         if(This->service_provider)
             IServiceProvider_Release(This->service_provider);
         if(This->stgmed_buf)
@@ -898,7 +898,8 @@ static HRESULT WINAPI Binding_Abort(IBinding *iface)
     if(This->state & BINDING_ABORTED)
         return E_FAIL;
 
-    hres = IInternetProtocolEx_Abort(PROTOCOLEX(This->protocol), E_ABORT, ERROR_SUCCESS);
+    hres = IInternetProtocolEx_Abort(&This->protocol->IInternetProtocolEx_iface, E_ABORT,
+            ERROR_SUCCESS);
     if(FAILED(hres))
         return hres;
 
@@ -1115,7 +1116,8 @@ static void report_data(Binding *This, DWORD bscf, ULONG progress, ULONG progres
         HRESULT hres;
 
         if(!(This->state & BINDING_LOCKED)) {
-            HRESULT hres = IInternetProtocolEx_LockRequest(PROTOCOLEX(This->protocol), 0);
+            HRESULT hres = IInternetProtocolEx_LockRequest(
+                    &This->protocol->IInternetProtocolEx_iface, 0);
             if(SUCCEEDED(hres))
                 This->state |= BINDING_LOCKED;
         }
@@ -1156,7 +1158,7 @@ static HRESULT WINAPI InternetProtocolSink_ReportResult(IInternetProtocolSink *i
     TRACE("(%p)->(%08x %d %s)\n", This, hrResult, dwError, debugstr_w(szResult));
 
     stop_binding(This, hrResult, szResult);
-    IInternetProtocolEx_Terminate(PROTOCOLEX(This->protocol), 0);
+    IInternetProtocolEx_Terminate(&This->protocol->IInternetProtocolEx_iface, 0);
     return S_OK;
 }
 
@@ -1459,7 +1461,7 @@ static HRESULT Binding_Create(IMoniker *mon, Binding *binding_ctx, IUri *uri, IB
 
     if(binding_ctx) {
         ret->protocol = binding_ctx->protocol;
-        IInternetProtocolEx_AddRef(PROTOCOLEX(ret->protocol));
+        IInternetProtocolEx_AddRef(&ret->protocol->IInternetProtocolEx_iface);
     }else {
         hres = create_binding_protocol(TRUE, &ret->protocol);
         if(FAILED(hres)) {
@@ -1501,7 +1503,7 @@ static HRESULT Binding_Create(IMoniker *mon, Binding *binding_ctx, IUri *uri, IB
         IUnknown_AddRef(&ret->stgmed_buf->IUnknown_iface);
         ret->clipboard_format = binding_ctx->clipboard_format;
     }else {
-        ret->stgmed_buf = create_stgmed_buf(PROTOCOLEX(ret->protocol));
+        ret->stgmed_buf = create_stgmed_buf(&ret->protocol->IInternetProtocolEx_iface);
     }
 
     if(to_obj) {
@@ -1547,8 +1549,8 @@ static HRESULT start_binding(IMoniker *mon, Binding *binding_ctx, IUri *uri, IBi
         report_data(binding, BSCF_FIRSTDATANOTIFICATION | (binding_ctx->download_state == END_DOWNLOAD ? BSCF_LASTDATANOTIFICATION : 0),
                 0, 0);
     }else {
-        hres = IInternetProtocolEx_StartEx(PROTOCOLEX(binding->protocol), uri, PROTSINK(binding),
-                 BINDINF(binding), PI_APARTMENTTHREADED|PI_MIMEVERIFICATION, 0);
+        hres = IInternetProtocolEx_StartEx(&binding->protocol->IInternetProtocolEx_iface, uri,
+                PROTSINK(binding), BINDINF(binding), PI_APARTMENTTHREADED|PI_MIMEVERIFICATION, 0);
 
         TRACE("start ret %08x\n", hres);
 
@@ -1590,7 +1592,7 @@ HRESULT bind_to_storage(IUri *uri, IBindCtx *pbc, REFIID riid, void **ppv)
 
     if(binding->hres == S_OK && binding->stgmed_buf->init) {
         if((binding->state & BINDING_STOPPED) && (binding->state & BINDING_LOCKED))
-            IInternetProtocolEx_UnlockRequest(PROTOCOLEX(binding->protocol));
+            IInternetProtocolEx_UnlockRequest(&binding->protocol->IInternetProtocolEx_iface);
 
         hres = binding->stgmed_obj->vtbl->get_result(binding->stgmed_obj, binding->bindf, ppv);
     }else if(binding->bindf & BINDF_ASYNCHRONOUS) {
diff --git a/dlls/urlmon/bindprot.c b/dlls/urlmon/bindprot.c
index 952077d889b..d982b43b38d 100644
--- a/dlls/urlmon/bindprot.c
+++ b/dlls/urlmon/bindprot.c
@@ -68,7 +68,7 @@ static LRESULT WINAPI notif_wnd_proc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM
             This->continue_call--;
         }
 
-        IInternetProtocolEx_Release(PROTOCOLEX(This));
+        IInternetProtocolEx_Release(&This->IInternetProtocolEx_iface);
         return 0;
     }
     case WM_MK_RELEASE: {
@@ -167,7 +167,7 @@ static void push_task(BindProtocol *This, task_header_t *task, task_proc_t proc)
     LeaveCriticalSection(&This->section);
 
     if(do_post) {
-        IInternetProtocolEx_AddRef(PROTOCOLEX(This));
+        IInternetProtocolEx_AddRef(&This->IInternetProtocolEx_iface);
         PostMessageW(This->notif_hwnd, WM_MK_CONTINUE, 0, (LPARAM)This);
     }
 }
@@ -244,25 +244,28 @@ static void mime_available(BindProtocol *This, LPCWSTR mime, BOOL verified)
     }
 }
 
-#define PROTOCOL_THIS(iface) DEFINE_THIS(BindProtocol, IInternetProtocolEx, iface)
+static inline BindProtocol *impl_from_IInternetProtocolEx(IInternetProtocolEx *iface)
+{
+    return CONTAINING_RECORD(iface, BindProtocol, IInternetProtocolEx_iface);
+}
 
 static HRESULT WINAPI BindProtocol_QueryInterface(IInternetProtocolEx *iface, REFIID riid, void **ppv)
 {
-    BindProtocol *This = PROTOCOL_THIS(iface);
+    BindProtocol *This = impl_from_IInternetProtocolEx(iface);
 
     *ppv = NULL;
     if(IsEqualGUID(&IID_IUnknown, riid)) {
         TRACE("(%p)->(IID_IUnknown %p)\n", This, ppv);
-        *ppv = PROTOCOLEX(This);
+        *ppv = &This->IInternetProtocolEx_iface;
     }else if(IsEqualGUID(&IID_IInternetProtocolRoot, riid)) {
         TRACE("(%p)->(IID_IInternetProtocolRoot %p)\n", This, ppv);
-        *ppv = PROTOCOLEX(This);
+        *ppv = &This->IInternetProtocolEx_iface;
     }else if(IsEqualGUID(&IID_IInternetProtocol, riid)) {
         TRACE("(%p)->(IID_IInternetProtocol %p)\n", This, ppv);
-        *ppv = PROTOCOLEX(This);
+        *ppv = &This->IInternetProtocolEx_iface;
     }else if(IsEqualGUID(&IID_IInternetProtocolEx, riid)) {
         TRACE("(%p)->(IID_IInternetProtocolEx %p)\n", This, ppv);
-        *ppv = PROTOCOLEX(This);
+        *ppv = &This->IInternetProtocolEx_iface;
     }else if(IsEqualGUID(&IID_IInternetBindInfo, riid)) {
         TRACE("(%p)->(IID_IInternetBindInfo %p)\n", This, ppv);
         *ppv = BINDINFO(This);
@@ -316,7 +319,7 @@ static HRESULT WINAPI BindProtocol_QueryInterface(IInternetProtocolEx *iface, RE
 
 static ULONG WINAPI BindProtocol_AddRef(IInternetProtocolEx *iface)
 {
-    BindProtocol *This = PROTOCOL_THIS(iface);
+    BindProtocol *This = impl_from_IInternetProtocolEx(iface);
     LONG ref = InterlockedIncrement(&This->ref);
     TRACE("(%p) ref=%d\n", This, ref);
     return ref;
@@ -324,7 +327,7 @@ static ULONG WINAPI BindProtocol_AddRef(IInternetProtocolEx *iface)
 
 static ULONG WINAPI BindProtocol_Release(IInternetProtocolEx *iface)
 {
-    BindProtocol *This = PROTOCOL_THIS(iface);
+    BindProtocol *This = impl_from_IInternetProtocolEx(iface);
     LONG ref = InterlockedDecrement(&This->ref);
 
     TRACE("(%p) ref=%d\n", This, ref);
@@ -362,7 +365,7 @@ static HRESULT WINAPI BindProtocol_Start(IInternetProtocolEx *iface, LPCWSTR szU
         IInternetProtocolSink *pOIProtSink, IInternetBindInfo *pOIBindInfo,
         DWORD grfPI, HANDLE_PTR dwReserved)
 {
-    BindProtocol *This = PROTOCOL_THIS(iface);
+    BindProtocol *This = impl_from_IInternetProtocolEx(iface);
     IUri *uri;
     HRESULT hres;
 
@@ -373,8 +376,8 @@ static HRESULT WINAPI BindProtocol_Start(IInternetProtocolEx *iface, LPCWSTR szU
     if(FAILED(hres))
         return hres;
 
-    hres = IInternetProtocolEx_StartEx(PROTOCOLEX(This), uri, pOIProtSink, pOIBindInfo,
-            grfPI, (HANDLE*)dwReserved);
+    hres = IInternetProtocolEx_StartEx(&This->IInternetProtocolEx_iface, uri, pOIProtSink,
+            pOIBindInfo, grfPI, (HANDLE*)dwReserved);
 
     IUri_Release(uri);
     return hres;
@@ -382,7 +385,7 @@ static HRESULT WINAPI BindProtocol_Start(IInternetProtocolEx *iface, LPCWSTR szU
 
 static HRESULT WINAPI BindProtocol_Continue(IInternetProtocolEx *iface, PROTOCOLDATA *pProtocolData)
 {
-    BindProtocol *This = PROTOCOL_THIS(iface);
+    BindProtocol *This = impl_from_IInternetProtocolEx(iface);
 
     TRACE("(%p)->(%p)\n", This, pProtocolData);
 
@@ -392,7 +395,7 @@ static HRESULT WINAPI BindProtocol_Continue(IInternetProtocolEx *iface, PROTOCOL
 static HRESULT WINAPI BindProtocol_Abort(IInternetProtocolEx *iface, HRESULT hrReason,
         DWORD dwOptions)
 {
-    BindProtocol *This = PROTOCOL_THIS(iface);
+    BindProtocol *This = impl_from_IInternetProtocolEx(iface);
 
     TRACE("(%p)->(%08x %08x)\n", This, hrReason, dwOptions);
 
@@ -401,7 +404,7 @@ static HRESULT WINAPI BindProtocol_Abort(IInternetProtocolEx *iface, HRESULT hrR
 
 static HRESULT WINAPI BindProtocol_Terminate(IInternetProtocolEx *iface, DWORD dwOptions)
 {
-    BindProtocol *This = PROTOCOL_THIS(iface);
+    BindProtocol *This = impl_from_IInternetProtocolEx(iface);
 
     TRACE("(%p)->(%08x)\n", This, dwOptions);
 
@@ -410,14 +413,14 @@ static HRESULT WINAPI BindProtocol_Terminate(IInternetProtocolEx *iface, DWORD d
 
 static HRESULT WINAPI BindProtocol_Suspend(IInternetProtocolEx *iface)
 {
-    BindProtocol *This = PROTOCOL_THIS(iface);
+    BindProtocol *This = impl_from_IInternetProtocolEx(iface);
     FIXME("(%p)\n", This);
     return E_NOTIMPL;
 }
 
 static HRESULT WINAPI BindProtocol_Resume(IInternetProtocolEx *iface)
 {
-    BindProtocol *This = PROTOCOL_THIS(iface);
+    BindProtocol *This = impl_from_IInternetProtocolEx(iface);
     FIXME("(%p)\n", This);
     return E_NOTIMPL;
 }
@@ -425,7 +428,7 @@ static HRESULT WINAPI BindProtocol_Resume(IInternetProtocolEx *iface)
 static HRESULT WINAPI BindProtocol_Read(IInternetProtocolEx *iface, void *pv,
         ULONG cb, ULONG *pcbRead)
 {
-    BindProtocol *This = PROTOCOL_THIS(iface);
+    BindProtocol *This = impl_from_IInternetProtocolEx(iface);
 
     TRACE("(%p)->(%p %u %p)\n", This, pv, cb, pcbRead);
 
@@ -437,14 +440,14 @@ static HRESULT WINAPI BindProtocol_Read(IInternetProtocolEx *iface, void *pv,
 static HRESULT WINAPI BindProtocol_Seek(IInternetProtocolEx *iface, LARGE_INTEGER dlibMove,
         DWORD dwOrigin, ULARGE_INTEGER *plibNewPosition)
 {
-    BindProtocol *This = PROTOCOL_THIS(iface);
+    BindProtocol *This = impl_from_IInternetProtocolEx(iface);
     FIXME("(%p)->(%d %d %p)\n", This, dlibMove.u.LowPart, dwOrigin, plibNewPosition);
     return E_NOTIMPL;
 }
 
 static HRESULT WINAPI BindProtocol_LockRequest(IInternetProtocolEx *iface, DWORD dwOptions)
 {
-    BindProtocol *This = PROTOCOL_THIS(iface);
+    BindProtocol *This = impl_from_IInternetProtocolEx(iface);
 
     TRACE("(%p)->(%08x)\n", This, dwOptions);
 
@@ -453,7 +456,7 @@ static HRESULT WINAPI BindProtocol_LockRequest(IInternetProtocolEx *iface, DWORD
 
 static HRESULT WINAPI BindProtocol_UnlockRequest(IInternetProtocolEx *iface)
 {
-    BindProtocol *This = PROTOCOL_THIS(iface);
+    BindProtocol *This = impl_from_IInternetProtocolEx(iface);
 
     TRACE("(%p)\n", This);
 
@@ -464,7 +467,7 @@ static HRESULT WINAPI BindProtocol_StartEx(IInternetProtocolEx *iface, IUri *pUr
         IInternetProtocolSink *pOIProtSink, IInternetBindInfo *pOIBindInfo,
         DWORD grfPI, HANDLE *dwReserved)
 {
-    BindProtocol *This = PROTOCOL_THIS(iface);
+    BindProtocol *This = impl_from_IInternetProtocolEx(iface);
     IInternetProtocol *protocol = NULL;
     IInternetProtocolEx *protocolex;
     IInternetPriority *priority;
@@ -579,8 +582,6 @@ void set_binding_sink(BindProtocol *This, IInternetProtocolSink *sink, IInternet
         IInternetBindInfo_Release(bind_info);
 }
 
-#undef PROTOCOL_THIS
-
 static const IInternetProtocolExVtbl BindProtocolVtbl = {
     BindProtocol_QueryInterface,
     BindProtocol_AddRef,
@@ -612,13 +613,13 @@ static HRESULT WINAPI ProtocolHandler_QueryInterface(IInternetProtocol *iface, R
 static ULONG WINAPI ProtocolHandler_AddRef(IInternetProtocol *iface)
 {
     BindProtocol *This = impl_from_IInternetProtocol(iface);
-    return IInternetProtocolEx_AddRef(PROTOCOLEX(This));
+    return IInternetProtocolEx_AddRef(&This->IInternetProtocolEx_iface);
 }
 
 static ULONG WINAPI ProtocolHandler_Release(IInternetProtocol *iface)
 {
     BindProtocol *This = impl_from_IInternetProtocol(iface);
-    return IInternetProtocolEx_Release(PROTOCOLEX(This));
+    return IInternetProtocolEx_Release(&This->IInternetProtocolEx_iface);
 }
 
 static HRESULT WINAPI ProtocolHandler_Start(IInternetProtocol *iface, LPCWSTR szUrl,
@@ -777,19 +778,19 @@ static HRESULT WINAPI BindInfo_QueryInterface(IInternetBindInfo *iface,
         REFIID riid, void **ppv)
 {
     BindProtocol *This = BINDINFO_THIS(iface);
-    return IInternetProtocolEx_QueryInterface(PROTOCOLEX(This), riid, ppv);
+    return IInternetProtocolEx_QueryInterface(&This->IInternetProtocolEx_iface, riid, ppv);
 }
 
 static ULONG WINAPI BindInfo_AddRef(IInternetBindInfo *iface)
 {
     BindProtocol *This = BINDINFO_THIS(iface);
-    return IInternetProtocolEx_AddRef(PROTOCOLEX(This));
+    return IInternetProtocolEx_AddRef(&This->IInternetProtocolEx_iface);
 }
 
 static ULONG WINAPI BindInfo_Release(IInternetBindInfo *iface)
 {
     BindProtocol *This = BINDINFO_THIS(iface);
-    return IInternetProtocolEx_Release(PROTOCOLEX(This));
+    return IInternetProtocolEx_Release(&This->IInternetProtocolEx_iface);
 }
 
 static HRESULT WINAPI BindInfo_GetBindInfo(IInternetBindInfo *iface,
@@ -836,19 +837,19 @@ static HRESULT WINAPI InternetPriority_QueryInterface(IInternetPriority *iface,
         REFIID riid, void **ppv)
 {
     BindProtocol *This = PRIORITY_THIS(iface);
-    return IInternetProtocolEx_QueryInterface(PROTOCOLEX(This), riid, ppv);
+    return IInternetProtocolEx_QueryInterface(&This->IInternetProtocolEx_iface, riid, ppv);
 }
 
 static ULONG WINAPI InternetPriority_AddRef(IInternetPriority *iface)
 {
     BindProtocol *This = PRIORITY_THIS(iface);
-    return IInternetProtocolEx_AddRef(PROTOCOLEX(This));
+    return IInternetProtocolEx_AddRef(&This->IInternetProtocolEx_iface);
 }
 
 static ULONG WINAPI InternetPriority_Release(IInternetPriority *iface)
 {
     BindProtocol *This = PRIORITY_THIS(iface);
-    return IInternetProtocolEx_Release(PROTOCOLEX(This));
+    return IInternetProtocolEx_Release(&This->IInternetProtocolEx_iface);
 }
 
 static HRESULT WINAPI InternetPriority_SetPriority(IInternetPriority *iface, LONG nPriority)
@@ -888,19 +889,19 @@ static HRESULT WINAPI BPInternetProtocolSink_QueryInterface(IInternetProtocolSin
         REFIID riid, void **ppv)
 {
     BindProtocol *This = PROTSINK_THIS(iface);
-    return IInternetProtocolEx_QueryInterface(PROTOCOLEX(This), riid, ppv);
+    return IInternetProtocolEx_QueryInterface(&This->IInternetProtocolEx_iface, riid, ppv);
 }
 
 static ULONG WINAPI BPInternetProtocolSink_AddRef(IInternetProtocolSink *iface)
 {
     BindProtocol *This = PROTSINK_THIS(iface);
-    return IInternetProtocolEx_AddRef(PROTOCOLEX(This));
+    return IInternetProtocolEx_AddRef(&This->IInternetProtocolEx_iface);
 }
 
 static ULONG WINAPI BPInternetProtocolSink_Release(IInternetProtocolSink *iface)
 {
     BindProtocol *This = PROTSINK_THIS(iface);
-    return IInternetProtocolEx_Release(PROTOCOLEX(This));
+    return IInternetProtocolEx_Release(&This->IInternetProtocolEx_iface);
 }
 
 typedef struct {
@@ -1197,19 +1198,19 @@ static const IInternetProtocolSinkVtbl InternetProtocolSinkVtbl = {
 static HRESULT WINAPI WinInetHttpInfo_QueryInterface(IWinInetHttpInfo *iface, REFIID riid, void **ppv)
 {
     BindProtocol *This = INETINFO_THIS(iface);
-    return IInternetProtocolEx_QueryInterface(PROTOCOLEX(This), riid, ppv);
+    return IInternetProtocolEx_QueryInterface(&This->IInternetProtocolEx_iface, riid, ppv);
 }
 
 static ULONG WINAPI WinInetHttpInfo_AddRef(IWinInetHttpInfo *iface)
 {
     BindProtocol *This = INETINFO_THIS(iface);
-    return IInternetProtocolEx_AddRef(PROTOCOLEX(This));
+    return IInternetProtocolEx_AddRef(&This->IInternetProtocolEx_iface);
 }
 
 static ULONG WINAPI WinInetHttpInfo_Release(IWinInetHttpInfo *iface)
 {
     BindProtocol *This = INETINFO_THIS(iface);
-    return IInternetProtocolEx_Release(PROTOCOLEX(This));
+    return IInternetProtocolEx_Release(&This->IInternetProtocolEx_iface);
 }
 
 static HRESULT WINAPI WinInetHttpInfo_QueryOption(IWinInetHttpInfo *iface, DWORD dwOption,
@@ -1244,19 +1245,19 @@ static HRESULT WINAPI BPServiceProvider_QueryInterface(IServiceProvider *iface,
         REFIID riid, void **ppv)
 {
     BindProtocol *This = SERVPROV_THIS(iface);
-    return IInternetProtocolEx_QueryInterface(PROTOCOLEX(This), riid, ppv);
+    return IInternetProtocolEx_QueryInterface(&This->IInternetProtocolEx_iface, riid, ppv);
 }
 
 static ULONG WINAPI BPServiceProvider_AddRef(IServiceProvider *iface)
 {
     BindProtocol *This = SERVPROV_THIS(iface);
-    return IInternetProtocolEx_AddRef(PROTOCOLEX(This));
+    return IInternetProtocolEx_AddRef(&This->IInternetProtocolEx_iface);
 }
 
 static ULONG WINAPI BPServiceProvider_Release(IServiceProvider *iface)
 {
     BindProtocol *This = SERVPROV_THIS(iface);
-    return IInternetProtocolEx_Release(PROTOCOLEX(This));
+    return IInternetProtocolEx_Release(&This->IInternetProtocolEx_iface);
 }
 
 static HRESULT WINAPI BPServiceProvider_QueryService(IServiceProvider *iface,
@@ -1285,7 +1286,7 @@ HRESULT create_binding_protocol(BOOL from_urlmon, BindProtocol **protocol)
 {
     BindProtocol *ret = heap_alloc_zero(sizeof(BindProtocol));
 
-    ret->lpIInternetProtocolExVtbl      = &BindProtocolVtbl;
+    ret->IInternetProtocolEx_iface.lpVtbl   = &BindProtocolVtbl;
     ret->lpInternetBindInfoVtbl         = &InternetBindInfoVtbl;
     ret->lpInternetPriorityVtbl         = &InternetPriorityVtbl;
     ret->lpServiceProviderVtbl          = &ServiceProviderVtbl;
diff --git a/dlls/urlmon/session.c b/dlls/urlmon/session.c
index c39b6ea5d80..fc36c0bcceb 100644
--- a/dlls/urlmon/session.c
+++ b/dlls/urlmon/session.c
@@ -437,7 +437,7 @@ static HRESULT WINAPI InternetSession_CreateBinding(IInternetSession *iface,
     if(FAILED(hres))
         return hres;
 
-    *ppOInetProt = (IInternetProtocol*)PROTOCOLEX(protocol);
+    *ppOInetProt = (IInternetProtocol*)&protocol->IInternetProtocolEx_iface;
     return S_OK;
 }
 
diff --git a/dlls/urlmon/urlmon_main.h b/dlls/urlmon/urlmon_main.h
index 68818e47838..1fafa82f66f 100644
--- a/dlls/urlmon/urlmon_main.h
+++ b/dlls/urlmon/urlmon_main.h
@@ -169,7 +169,7 @@ HRESULT create_protocol_proxy(IInternetProtocol*,IInternetProtocolSink*,Protocol
 typedef struct _task_header_t task_header_t;
 
 typedef struct {
-    const IInternetProtocolExVtbl    *lpIInternetProtocolExVtbl;
+    IInternetProtocolEx   IInternetProtocolEx_iface;
     const IInternetBindInfoVtbl      *lpInternetBindInfoVtbl;
     const IInternetPriorityVtbl      *lpInternetPriorityVtbl;
     const IServiceProviderVtbl       *lpServiceProviderVtbl;
@@ -210,8 +210,6 @@ typedef struct {
     ProtocolProxy *filter_proxy;
 }  BindProtocol;
 
-#define PROTOCOLEX(x)  ((IInternetProtocolEx*)  &(x)->lpIInternetProtocolExVtbl)
-
 HRESULT create_binding_protocol(BOOL,BindProtocol**);
 void set_binding_sink(BindProtocol*,IInternetProtocolSink*,IInternetBindInfo*);