--- old/src/share/vm/gc/g1/concurrentMark.hpp	2015-06-12 14:48:31.584156258 +0200
+++ new/src/share/vm/gc/g1/concurrentMark.hpp	2015-06-12 14:48:31.460152218 +0200
@@ -450,7 +450,7 @@
 
   double*   _accum_task_vtime;   // Accumulated task vtime
 
-  FlexibleWorkGang* _parallel_workers;
+  WorkGang* _parallel_workers;
 
   ForceOverflowSettings _force_overflow_conc;
   ForceOverflowSettings _force_overflow_stw;