diff --git a/ipc/glue/WindowsMessageLoop.cpp b/ipc/glue/WindowsMessageLoop.cpp
index 66e977fb206c..2a2a8b596de2 100644
--- a/ipc/glue/WindowsMessageLoop.cpp
+++ b/ipc/glue/WindowsMessageLoop.cpp
@@ -501,6 +501,8 @@ UnhookNeuteredWindows()
     RestoreWindowProcedure(gNeuteredWindows->ElementAt(index));
   }
   gNeuteredWindows->Clear();
+  delete gNeuteredWindows;
+  gNeuteredWindows = NULL;
 }
 
 void