diff --git a/mozilla/layout/generic/nsFrameFrame.cpp b/mozilla/layout/generic/nsFrameFrame.cpp
index 549b461d464..91925347755 100644
--- a/mozilla/layout/generic/nsFrameFrame.cpp
+++ b/mozilla/layout/generic/nsFrameFrame.cpp
@@ -1053,7 +1053,12 @@ nsHTMLFrameInnerFrame::CreateDocShell(nsIPresContext* aPresContext,
   presShell->GetViewManager(getter_AddRefs(viewMan));  
   rv = view->Init(viewMan, viewBounds, parView);
   viewMan->InsertChild(parView, view, 0);
-  rv = view->CreateWidget(kCChildCID);
+
+  nsWidgetInitData initData;
+  initData.clipChildren = PR_TRUE;
+  initData.clipSiblings = PR_TRUE;
+
+  rv = view->CreateWidget(kCChildCID, &initData);
   SetView(aPresContext, view);
 
   // if the visibility is hidden, reflect that in the view
diff --git a/mozilla/layout/html/document/src/nsFrameFrame.cpp b/mozilla/layout/html/document/src/nsFrameFrame.cpp
index 549b461d464..91925347755 100644
--- a/mozilla/layout/html/document/src/nsFrameFrame.cpp
+++ b/mozilla/layout/html/document/src/nsFrameFrame.cpp
@@ -1053,7 +1053,12 @@ nsHTMLFrameInnerFrame::CreateDocShell(nsIPresContext* aPresContext,
   presShell->GetViewManager(getter_AddRefs(viewMan));  
   rv = view->Init(viewMan, viewBounds, parView);
   viewMan->InsertChild(parView, view, 0);
-  rv = view->CreateWidget(kCChildCID);
+
+  nsWidgetInitData initData;
+  initData.clipChildren = PR_TRUE;
+  initData.clipSiblings = PR_TRUE;
+
+  rv = view->CreateWidget(kCChildCID, &initData);
   SetView(aPresContext, view);
 
   // if the visibility is hidden, reflect that in the view