--- a/hotspot/src/share/vm/gc/g1/heapRegionRemSet.hpp	Mon Oct 19 15:03:58 2015 +0200
+++ b/hotspot/src/share/vm/gc/g1/heapRegionRemSet.hpp	Thu Oct 22 13:07:10 2015 -0400
@@ -222,7 +222,7 @@
 
 public:
   enum Event {
-    Event_EvacStart, Event_EvacEnd, Event_RSUpdateEnd
+    Event_EvacStart, Event_EvacEnd, Event_RSUpdateEnd, Event_illegal
   };
 
 private: