diff --git a/mozilla/gfx/src/nsImageSystemServices.cpp b/mozilla/gfx/src/nsImageSystemServices.cpp
index d957b160929..d3a689e1abe 100644
--- a/mozilla/gfx/src/nsImageSystemServices.cpp
+++ b/mozilla/gfx/src/nsImageSystemServices.cpp
@@ -99,8 +99,6 @@ ImageSystemServicesImpl::SetTimeout(ilTimeoutCallbackFunction aFunc,
         return nsnull;
     }
 
-    NS_ADDREF(timer);
-
     return (void *)timer;
 }