diff --git a/src/as/com/threerings/presents/dobj/AttributeChangedEvent.as b/src/as/com/threerings/presents/dobj/AttributeChangedEvent.as
index ca5f55bc0..1c0c0c7b7 100644
--- a/src/as/com/threerings/presents/dobj/AttributeChangedEvent.as
+++ b/src/as/com/threerings/presents/dobj/AttributeChangedEvent.as
@@ -77,7 +77,7 @@ public class AttributeChangedEvent extends NamedEvent
     override protected function notifyListener (listener :Object) :void
     {
         if (listener is AttributeChangeListener) {
-            listener.attributeChanged(this);
+            (listener as AttributeChangeListener).attributeChanged(this);
         }
     }