--- a/hotspot/src/share/vm/gc_implementation/g1/g1_globals.hpp	Wed Jul 05 18:41:33 2017 +0200
+++ b/hotspot/src/share/vm/gc_implementation/g1/g1_globals.hpp	Thu Feb 21 23:58:05 2013 -0800
@@ -32,7 +32,7 @@
 
 #define G1_FLAGS(develop, develop_pd, product, product_pd, diagnostic, experimental, notproduct, manageable, product_rw) \
                                                                             \
-  product(intx, G1ConfidencePercent, 50,                                    \
+  product(uintx, G1ConfidencePercent, 50,                                   \
           "Confidence level for MMU/pause predictions")                     \
                                                                             \
   develop(intx, G1MarkingOverheadPercent, 0,                                \