diff --git a/dom/plugins/ipc/PluginHangUIParent.cpp b/dom/plugins/ipc/PluginHangUIParent.cpp
index 2749f2ca2d5..e3b7755adac 100644
--- a/dom/plugins/ipc/PluginHangUIParent.cpp
+++ b/dom/plugins/ipc/PluginHangUIParent.cpp
@@ -116,7 +116,7 @@ PluginHangUIParent::Init(const nsString& aPluginName)
 
   nsresult rv;
   rv = mMiniShm.Init(this, ::IsDebuggerPresent() ? INFINITE : kTimeout);
-  NS_ENSURE_SUCCESS(rv, rv);
+  NS_ENSURE_SUCCESS(rv, false);
   nsCOMPtr<nsIProperties>
     directoryService(do_GetService(NS_DIRECTORY_SERVICE_CONTRACTID));
   if (!directoryService) {