diff --git a/dom/src/base/nsGlobalWindow.h b/dom/src/base/nsGlobalWindow.h
index c20baf453a1..f76f07718a1 100644
--- a/dom/src/base/nsGlobalWindow.h
+++ b/dom/src/base/nsGlobalWindow.h
@@ -693,7 +693,6 @@ protected:
 
   friend class nsDOMScriptableHelper;
   friend class nsDOMWindowUtils;
-  static nsIScriptSecurityManager *sSecMan;
   static nsIFactory *sComputedDOMStyleFactory;
 };