diff --git a/mailnews/base/src/nsMsgNotificationManager.cpp b/mailnews/base/src/nsMsgNotificationManager.cpp
index 0052a910e1b8..1032d1c1d80c 100644
--- a/mailnews/base/src/nsMsgNotificationManager.cpp
+++ b/mailnews/base/src/nsMsgNotificationManager.cpp
@@ -241,7 +241,7 @@ nsresult nsMsgNotificationManager::AddNewMailNotification(nsIMsgFolder *folder)
 
 
 	nsCOMPtr<nsIRDFResource> notificationResource;
-	rv = rdfService->GetResource(newMailURI, getter_AddRefs(notificationResource));
+	rv = rdfService->GetResource((const char *) newMailURI, getter_AddRefs(notificationResource));
 	if(NS_FAILED(rv))
 		return rv;