diff -r 2f8db587e1fc -r 626f594dffa6 src/share/vm/gc_implementation/g1/heapRegionRemSet.hpp
--- a/src/share/vm/gc_implementation/g1/heapRegionRemSet.hpp	Thu Feb 18 16:15:28 2016 +0100
+++ b/src/share/vm/gc_implementation/g1/heapRegionRemSet.hpp	Tue Mar 01 12:50:37 2016 +0530
@@ -232,7 +232,7 @@
 
 public:
   enum Event {
-    Event_EvacStart, Event_EvacEnd, Event_RSUpdateEnd
+    Event_EvacStart, Event_EvacEnd, Event_RSUpdateEnd, Event_illegal
   };
 
 private: