--- old/src/share/vm/gc_implementation/g1/g1GCPhaseTimes.hpp	2013-01-14 21:55:29.000000000 +0100
+++ new/src/share/vm/gc_implementation/g1/g1GCPhaseTimes.hpp	2013-01-14 21:55:29.000000000 +0100
@@ -35,6 +35,8 @@
   const char* _print_format;
   bool        _print_sum;
 
+  NOT_PRODUCT(static const T _uninitialized;)
+
   // We are caching the sum and average to only have to calculate them once.
   // This is not done in an MT-safe way. It is intetened to allow single
   // threaded code to call sum() and average() multiple times in any order