--- old/src/share/vm/gc_implementation/g1/g1CollectedHeap.hpp	2013-05-24 14:55:49.226530695 -0700
+++ new/src/share/vm/gc_implementation/g1/g1CollectedHeap.hpp	2013-05-24 14:55:49.010188131 -0700
@@ -818,7 +818,7 @@
                                OopClosure* scan_non_heap_roots,
                                OopsInHeapRegionClosure* scan_rs,
                                G1KlassScanClosure* scan_klasses,
-                               int worker_i);
+                               uint worker_i);
 
   // Apply "blk" to all the weak roots of the system.  These include
   // JNI weak roots, the code cache, system dictionary, symbol table,