diff --git a/dlls/shdocvw/dochost.c b/dlls/shdocvw/dochost.c
index f64ae090e29..c3a22f461df 100644
--- a/dlls/shdocvw/dochost.c
+++ b/dlls/shdocvw/dochost.c
@@ -25,6 +25,27 @@ WINE_DEFAULT_DEBUG_CHANNEL(shdocvw);
 
 static ATOM doc_view_atom = 0;
 
+void push_dochost_task(DocHost *This, task_header_t *task, task_proc_t proc, BOOL send)
+{
+    task->proc = proc;
+
+    /* FIXME: Don't use lParam */
+    if(send)
+        SendMessageW(This->frame_hwnd, WM_DOCHOSTTASK, 0, (LPARAM)task);
+    else
+        PostMessageW(This->frame_hwnd, WM_DOCHOSTTASK, 0, (LPARAM)task);
+}
+
+LRESULT process_dochost_task(DocHost *This, LPARAM lparam)
+{
+    task_header_t *task = (task_header_t*)lparam;
+
+    task->proc(This, task);
+
+    heap_free(task);
+    return 0;
+}
+
 static void navigate_complete(DocHost *This)
 {
     IDispatch *disp = NULL;
@@ -59,7 +80,7 @@ static void navigate_complete(DocHost *This)
         IDispatch_Release(disp);
 }
 
-static LRESULT navigate2(DocHost *This)
+void object_available(DocHost *This)
 {
     IHlinkTarget *hlink;
     HRESULT hres;
@@ -68,25 +89,25 @@ static LRESULT navigate2(DocHost *This)
 
     if(!This->document) {
         WARN("document == NULL\n");
-        return 0;
+        return;
     }
 
     hres = IUnknown_QueryInterface(This->document, &IID_IHlinkTarget, (void**)&hlink);
     if(FAILED(hres)) {
         FIXME("Could not get IHlinkTarget interface\n");
-        return 0;
+        return;
     }
 
     hres = IHlinkTarget_Navigate(hlink, 0, NULL);
     IHlinkTarget_Release(hlink);
     if(FAILED(hres)) {
         FIXME("Navigate failed\n");
-        return 0;
+        return;
     }
 
     navigate_complete(This);
 
-    return 0;
+    return;
 }
 
 static LRESULT resize_document(DocHost *This, LONG width, LONG height)
@@ -117,8 +138,6 @@ static LRESULT WINAPI doc_view_proc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM l
     switch(msg) {
     case WM_SIZE:
         return resize_document(This, LOWORD(lParam), HIWORD(lParam));
-    case WB_WM_NAVIGATE2:
-        return navigate2(This);
     }
 
     return DefWindowProcW(hwnd, msg, wParam, lParam);
diff --git a/dlls/shdocvw/iexplore.c b/dlls/shdocvw/iexplore.c
index e6387d50937..ca2c868d13d 100644
--- a/dlls/shdocvw/iexplore.c
+++ b/dlls/shdocvw/iexplore.c
@@ -77,6 +77,8 @@ ie_window_proc(HWND hwnd, UINT msg, WPARAM wparam, LPARAM lparam)
         return iewnd_OnDestroy(This);
     case WM_SIZE:
         return iewnd_OnSize(This, LOWORD(lparam), HIWORD(lparam));
+    case WM_DOCHOSTTASK:
+        return process_dochost_task(&This->doc_host, lparam);
     }
     return DefWindowProcW(hwnd, msg, wparam, lparam);
 }
diff --git a/dlls/shdocvw/navigate.c b/dlls/shdocvw/navigate.c
index 37245f7bbc7..4bf21a54cea 100644
--- a/dlls/shdocvw/navigate.c
+++ b/dlls/shdocvw/navigate.c
@@ -269,10 +269,16 @@ static HRESULT WINAPI BindStatusCallback_OnDataAvailable(IBindStatusCallback *if
     return E_NOTIMPL;
 }
 
+static void object_available_proc(DocHost *This, task_header_t *task)
+{
+    object_available(This);
+}
+
 static HRESULT WINAPI BindStatusCallback_OnObjectAvailable(IBindStatusCallback *iface,
         REFIID riid, IUnknown *punk)
 {
     BindStatusCallback *This = BINDSC_THIS(iface);
+    task_header_t *task;
     IOleObject *oleobj;
     HRESULT hres;
 
@@ -302,7 +308,8 @@ static HRESULT WINAPI BindStatusCallback_OnObjectAvailable(IBindStatusCallback *
     /* FIXME: Call SetAdvise */
     /* FIXME: Call Invoke(DISPID_READYSTATE) */
 
-    PostMessageW(This->doc_host->hwnd, WB_WM_NAVIGATE2, 0, 0);
+    task = heap_alloc(sizeof(*task));
+    push_dochost_task(This->doc_host, task, object_available_proc, FALSE);
 
     return S_OK;
 }
diff --git a/dlls/shdocvw/oleobject.c b/dlls/shdocvw/oleobject.c
index f07460fee07..8d05b775257 100644
--- a/dlls/shdocvw/oleobject.c
+++ b/dlls/shdocvw/oleobject.c
@@ -61,6 +61,8 @@ static LRESULT WINAPI shell_embedding_proc(HWND hwnd, UINT msg, WPARAM wParam, L
     switch(msg) {
     case WM_SIZE:
         return resize_window(This, LOWORD(lParam), HIWORD(lParam));
+    case WM_DOCHOSTTASK:
+        return process_dochost_task(&This->doc_host, lParam);
     }
 
     return DefWindowProcW(hwnd, msg, wParam, lParam);
diff --git a/dlls/shdocvw/shdocvw.h b/dlls/shdocvw/shdocvw.h
index 5b9ed460be9..bc4c2a1708a 100644
--- a/dlls/shdocvw/shdocvw.h
+++ b/dlls/shdocvw/shdocvw.h
@@ -51,6 +51,7 @@ extern HRESULT SHDOCVW_GetShellInstanceObjectClassObject(REFCLSID rclsid,
  */
 
 typedef struct ConnectionPoint ConnectionPoint;
+typedef struct DocHost DocHost;
 
 typedef struct {
     const IConnectionPointContainerVtbl *lpConnectionPointContainerVtbl;
@@ -62,7 +63,15 @@ typedef struct {
     IUnknown *impl;
 } ConnectionPointContainer;
 
-typedef struct {
+struct _task_header_t;
+
+typedef void (*task_proc_t)(DocHost*, struct _task_header_t*);
+
+typedef struct _task_header_t {
+    task_proc_t proc;
+} task_header_t;
+
+struct DocHost {
     const IOleClientSiteVtbl      *lpOleClientSiteVtbl;
     const IOleInPlaceSiteVtbl     *lpOleInPlaceSiteVtbl;
     const IDocHostUIHandler2Vtbl  *lpDocHostUIHandlerVtbl;
@@ -92,7 +101,7 @@ typedef struct {
     VARIANT_BOOL offline;
 
     ConnectionPointContainer cps;
-} DocHost;
+};
 
 struct WebBrowser {
     /* Interfaces available via WebBrowser object */
@@ -198,17 +207,20 @@ HRESULT WebBrowserV2_Create(IUnknown*,REFIID,void**);
 
 void create_doc_view_hwnd(DocHost*);
 void deactivate_document(DocHost*);
+void object_available(DocHost*);
 void call_sink(ConnectionPoint*,DISPID,DISPPARAMS*);
 HRESULT navigate_url(DocHost*,LPCWSTR,const VARIANT*,const VARIANT*,VARIANT*,VARIANT*);
 HRESULT go_home(DocHost*);
 
+#define WM_DOCHOSTTASK (WM_USER+0x300)
+void push_dochost_task(DocHost*,task_header_t*,task_proc_t,BOOL);
+LRESULT  process_dochost_task(DocHost*,LPARAM);
+
 HRESULT InternetExplorer_Create(IUnknown*,REFIID,void**);
 void InternetExplorer_WebBrowser_Init(InternetExplorer*);
 
 HRESULT CUrlHistory_Create(IUnknown*,REFIID,void**);
 
-#define WB_WM_NAVIGATE2 (WM_USER+100)
-
 #define DEFINE_THIS(cls,ifc,iface) ((cls*)((BYTE*)(iface)-offsetof(cls,lp ## ifc ## Vtbl)))
 
 /**********************************************************************