diff --git a/dom/src/base/nsGlobalWindow.cpp b/dom/src/base/nsGlobalWindow.cpp
index ee9d4723c1e1..db234da00065 100644
--- a/dom/src/base/nsGlobalWindow.cpp
+++ b/dom/src/base/nsGlobalWindow.cpp
@@ -5482,6 +5482,8 @@ nsGlobalWindow::FireDelayedDOMEvents()
     mFireOfflineStatusChangeEventOnThaw = PR_FALSE;
     FireOfflineStatusEvent();
   }
+
+  return NS_OK;
 }
 
 //*****************************************************************************