diff -r a49a647afe9a -r ba764ed4b6f2 src/cpu/sparc/vm/c1_MacroAssembler_sparc.cpp
--- a/src/cpu/sparc/vm/c1_MacroAssembler_sparc.cpp	Fri Apr 11 09:56:35 2008 -0400
+++ b/src/cpu/sparc/vm/c1_MacroAssembler_sparc.cpp	Sun Apr 13 17:43:42 2008 -0400
@@ -236,7 +236,7 @@
   Register t1,                         // temp register
   Register t2                          // temp register
   ) {
-  const int hdr_size_in_bytes = oopDesc::header_size_in_bytes();
+  const int hdr_size_in_bytes = instanceOopDesc::base_offset_in_bytes();
 
   initialize_header(obj, klass, noreg, t1, t2);