diff --git a/dlls/urlmon/http.c b/dlls/urlmon/http.c
index 9cc6117aaaa..5fcbd541743 100644
--- a/dlls/urlmon/http.c
+++ b/dlls/urlmon/http.c
@@ -32,6 +32,7 @@ WINE_DEFAULT_DEBUG_CHANNEL(urlmon);
 typedef struct {
     Protocol base;
 
+    IUnknown            IUnknown_outer;
     IInternetProtocolEx IInternetProtocolEx_iface;
     IInternetPriority   IInternetPriority_iface;
     IWinInetHttpInfo    IWinInetHttpInfo_iface;
@@ -41,8 +42,14 @@ typedef struct {
     WCHAR *full_header;
 
     LONG ref;
+    IUnknown *outer;
 } HttpProtocol;
 
+static inline HttpProtocol *impl_from_IUnknown(IUnknown *iface)
+{
+    return CONTAINING_RECORD(iface, HttpProtocol, IUnknown_outer);
+}
+
 static inline HttpProtocol *impl_from_IInternetProtocolEx(IInternetProtocolEx *iface)
 {
     return CONTAINING_RECORD(iface, HttpProtocol, IInternetProtocolEx_iface);
@@ -624,14 +631,13 @@ static const ProtocolVtbl AsyncProtocolVtbl = {
     HttpProtocol_on_error
 };
 
-static HRESULT WINAPI HttpProtocol_QueryInterface(IInternetProtocolEx *iface, REFIID riid, void **ppv)
+static HRESULT WINAPI HttpProtocolUnk_QueryInterface(IUnknown *iface, REFIID riid, void **ppv)
 {
-    HttpProtocol *This = impl_from_IInternetProtocolEx(iface);
+    HttpProtocol *This = impl_from_IUnknown(iface);
 
-    *ppv = NULL;
     if(IsEqualGUID(&IID_IUnknown, riid)) {
         TRACE("(%p)->(IID_IUnknown %p)\n", This, ppv);
-        *ppv = &This->IInternetProtocolEx_iface;
+        *ppv = &This->IUnknown_outer;
     }else if(IsEqualGUID(&IID_IInternetProtocolRoot, riid)) {
         TRACE("(%p)->(IID_IInternetProtocolRoot %p)\n", This, ppv);
         *ppv = &This->IInternetProtocolEx_iface;
@@ -650,28 +656,27 @@ static HRESULT WINAPI HttpProtocol_QueryInterface(IInternetProtocolEx *iface, RE
     }else if(IsEqualGUID(&IID_IWinInetHttpInfo, riid)) {
         TRACE("(%p)->(IID_IWinInetHttpInfo %p)\n", This, ppv);
         *ppv = &This->IWinInetHttpInfo_iface;
+    }else {
+        *ppv = NULL;
+        WARN("not supported interface %s\n", debugstr_guid(riid));
+        return E_NOINTERFACE;
     }
 
-    if(*ppv) {
-        IInternetProtocolEx_AddRef(iface);
-        return S_OK;
-    }
-
-    WARN("not supported interface %s\n", debugstr_guid(riid));
-    return E_NOINTERFACE;
+    IUnknown_AddRef((IUnknown*)*ppv);
+    return S_OK;
 }
 
-static ULONG WINAPI HttpProtocol_AddRef(IInternetProtocolEx *iface)
+static ULONG WINAPI HttpProtocolUnk_AddRef(IUnknown *iface)
 {
-    HttpProtocol *This = impl_from_IInternetProtocolEx(iface);
+    HttpProtocol *This = impl_from_IUnknown(iface);
     LONG ref = InterlockedIncrement(&This->ref);
     TRACE("(%p) ref=%d\n", This, ref);
     return ref;
 }
 
-static ULONG WINAPI HttpProtocol_Release(IInternetProtocolEx *iface)
+static ULONG WINAPI HttpProtocolUnk_Release(IUnknown *iface)
 {
-    HttpProtocol *This = impl_from_IInternetProtocolEx(iface);
+    HttpProtocol *This = impl_from_IUnknown(iface);
     LONG ref = InterlockedDecrement(&This->ref);
 
     TRACE("(%p) ref=%d\n", This, ref);
@@ -686,6 +691,33 @@ static ULONG WINAPI HttpProtocol_Release(IInternetProtocolEx *iface)
     return ref;
 }
 
+static const IUnknownVtbl HttpProtocolUnkVtbl = {
+    HttpProtocolUnk_QueryInterface,
+    HttpProtocolUnk_AddRef,
+    HttpProtocolUnk_Release
+};
+
+static HRESULT WINAPI HttpProtocol_QueryInterface(IInternetProtocolEx *iface, REFIID riid, void **ppv)
+{
+    HttpProtocol *This = impl_from_IInternetProtocolEx(iface);
+    TRACE("(%p)->(%s %p)\n", This, debugstr_guid(riid), ppv);
+    return IUnknown_QueryInterface(This->outer, riid, ppv);
+}
+
+static ULONG WINAPI HttpProtocol_AddRef(IInternetProtocolEx *iface)
+{
+    HttpProtocol *This = impl_from_IInternetProtocolEx(iface);
+    TRACE("(%p)\n", This);
+    return IUnknown_AddRef(This->outer);
+}
+
+static ULONG WINAPI HttpProtocol_Release(IInternetProtocolEx *iface)
+{
+    HttpProtocol *This = impl_from_IInternetProtocolEx(iface);
+    TRACE("(%p)\n", This);
+    return IUnknown_Release(This->outer);
+}
+
 static HRESULT WINAPI HttpProtocol_Start(IInternetProtocolEx *iface, LPCWSTR szUrl,
         IInternetProtocolSink *pOIProtSink, IInternetBindInfo *pOIBindInfo,
         DWORD grfPI, HANDLE_PTR dwReserved)
@@ -926,7 +958,7 @@ static const IWinInetHttpInfoVtbl WinInetHttpInfoVtbl = {
     HttpInfo_QueryInfo
 };
 
-static HRESULT create_http_protocol(BOOL https, void **ppobj)
+static HRESULT create_http_protocol(BOOL https, IUnknown *outer, void **ppobj)
 {
     HttpProtocol *ret;
 
@@ -935,29 +967,31 @@ static HRESULT create_http_protocol(BOOL https, void **ppobj)
         return E_OUTOFMEMORY;
 
     ret->base.vtbl = &AsyncProtocolVtbl;
+    ret->IUnknown_outer.lpVtbl            = &HttpProtocolUnkVtbl;
     ret->IInternetProtocolEx_iface.lpVtbl = &HttpProtocolVtbl;
     ret->IInternetPriority_iface.lpVtbl   = &HttpPriorityVtbl;
     ret->IWinInetHttpInfo_iface.lpVtbl    = &WinInetHttpInfoVtbl;
 
     ret->https = https;
     ret->ref = 1;
+    ret->outer = outer ? outer : &ret->IUnknown_outer;
 
-    *ppobj = &ret->IInternetProtocolEx_iface;
+    *ppobj = &ret->IUnknown_outer;
 
     URLMON_LockModule();
     return S_OK;
 }
 
-HRESULT HttpProtocol_Construct(IUnknown *pUnkOuter, LPVOID *ppobj)
+HRESULT HttpProtocol_Construct(IUnknown *outer, void **ppv)
 {
-    TRACE("(%p %p)\n", pUnkOuter, ppobj);
+    TRACE("(%p %p)\n", outer, ppv);
 
-    return create_http_protocol(FALSE, ppobj);
+    return create_http_protocol(FALSE, outer, ppv);
 }
 
-HRESULT HttpSProtocol_Construct(IUnknown *pUnkOuter, LPVOID *ppobj)
+HRESULT HttpSProtocol_Construct(IUnknown *outer, void **ppv)
 {
-    TRACE("(%p %p)\n", pUnkOuter, ppobj);
+    TRACE("(%p %p)\n", outer, ppv);
 
-    return create_http_protocol(TRUE, ppobj);
+    return create_http_protocol(TRUE, outer, ppv);
 }
diff --git a/dlls/urlmon/tests/protocol.c b/dlls/urlmon/tests/protocol.c
index f3710fca835..233a2c0bd33 100644
--- a/dlls/urlmon/tests/protocol.c
+++ b/dlls/urlmon/tests/protocol.c
@@ -4101,6 +4101,8 @@ START_TEST(protocol)
     CloseHandle(event_continue_done);
 
     test_com_aggregation(&CLSID_FileProtocol);
+    test_com_aggregation(&CLSID_HttpProtocol);
+    test_com_aggregation(&CLSID_HttpSProtocol);
 
     OleUninitialize();
 }