--- a/hotspot/src/cpu/x86/vm/register_definitions_x86.cpp	Fri Apr 11 09:56:35 2008 -0400
+++ b/hotspot/src/cpu/x86/vm/register_definitions_x86.cpp	Sun Apr 13 17:43:42 2008 -0400
@@ -106,6 +106,7 @@
 REGISTER_DEFINITION(Register, rscratch1);
 REGISTER_DEFINITION(Register, rscratch2);
 
+REGISTER_DEFINITION(Register, r12_heapbase);
 REGISTER_DEFINITION(Register, r15_thread);
 #endif // AMD64