diff --git a/mozilla/dom/src/jsurl/nsJSProtocolHandler.cpp b/mozilla/dom/src/jsurl/nsJSProtocolHandler.cpp
index 55fb1bfeb8f..19eb3b9e9fb 100644
--- a/mozilla/dom/src/jsurl/nsJSProtocolHandler.cpp
+++ b/mozilla/dom/src/jsurl/nsJSProtocolHandler.cpp
@@ -150,7 +150,7 @@ nsresult nsJSThunk::EvaluateScript(nsIChannel *aChannel)
     nsCOMPtr<nsPIDOMWindow> win(do_QueryInterface(global));
 
     // Get the document out of the window to make sure we create a new
-    // inner window if one doesn't already exist.
+    // inner window if one doesn't already exist (see bug 306630).
     nsCOMPtr<nsIDOMDocument> doc;
     win->GetDocument(getter_AddRefs(doc));