diff --git a/js/src/xpconnect/src/xpcprivate.h b/js/src/xpconnect/src/xpcprivate.h
index feca11e87b96..bd0ee5e9e72b 100644
--- a/js/src/xpconnect/src/xpcprivate.h
+++ b/js/src/xpconnect/src/xpcprivate.h
@@ -2099,7 +2099,6 @@ private:
 
 public:
     nsCOMPtr<nsIThread>          mThread; // Don't want to overload _mOwningThread
-#endif
 };
 
 /***************************************************************************