diff --git a/docshell/base/nsDocShell.cpp b/docshell/base/nsDocShell.cpp
index 4efdb97480f1..09002d5becb9 100644
--- a/docshell/base/nsDocShell.cpp
+++ b/docshell/base/nsDocShell.cpp
@@ -2991,7 +2991,8 @@ nsDocShell::Destroy()
     delete mEditorData;
     mEditorData = 0;
 
-    NS_IF_RELEASE(NS_STATIC_CAST(nsIClipboardDragDropHookList *, mTransferableHookData));
+    nsIClipboardDragDropHookList *list = NS_STATIC_CAST(nsIClipboardDragDropHookList *, mTransferableHookData);
+    NS_IF_RELEASE(list);
     delete mTransferableHookData;
     mTransferableHookData = nsnull;