diff --git a/layout/generic/nsObjectFrame.cpp b/layout/generic/nsObjectFrame.cpp
index 5f84fa9f9027..9a8f2bd5085d 100644
--- a/layout/generic/nsObjectFrame.cpp
+++ b/layout/generic/nsObjectFrame.cpp
@@ -1227,7 +1227,7 @@ nsObjectFrame::InstantiateWidget(nsIPresContext*          aPresContext,
 
   nsCOMPtr<nsIWidget> parent;
   parentWithView->GetOffsetFromWidget(nsnull, nsnull, *getter_AddRefs(parent));
-  mWidget->Create(parent, r, nsnull, nsnull);
+  mWidget->Create(NS_STATIC_CAST(nsIWidget*, parent), r, nsnull, nsnull);
 
   mWidget->Show(PR_TRUE);
   return rv;
diff --git a/layout/html/base/src/nsObjectFrame.cpp b/layout/html/base/src/nsObjectFrame.cpp
index 5f84fa9f9027..9a8f2bd5085d 100644
--- a/layout/html/base/src/nsObjectFrame.cpp
+++ b/layout/html/base/src/nsObjectFrame.cpp
@@ -1227,7 +1227,7 @@ nsObjectFrame::InstantiateWidget(nsIPresContext*          aPresContext,
 
   nsCOMPtr<nsIWidget> parent;
   parentWithView->GetOffsetFromWidget(nsnull, nsnull, *getter_AddRefs(parent));
-  mWidget->Create(parent, r, nsnull, nsnull);
+  mWidget->Create(NS_STATIC_CAST(nsIWidget*, parent), r, nsnull, nsnull);
 
   mWidget->Show(PR_TRUE);
   return rv;