diff -r a49a647afe9a -r ba764ed4b6f2 src/share/vm/oops/markOop.hpp
--- a/src/share/vm/oops/markOop.hpp	Fri Apr 11 09:56:35 2008 -0400
+++ b/src/share/vm/oops/markOop.hpp	Sun Apr 13 17:43:42 2008 -0400
@@ -89,7 +89,7 @@
   enum { age_bits                 = 4,
          lock_bits                = 2,
          biased_lock_bits         = 1,
-         max_hash_bits            = BitsPerOop - age_bits - lock_bits - biased_lock_bits,
+         max_hash_bits            = BitsPerWord - age_bits - lock_bits - biased_lock_bits,
          hash_bits                = max_hash_bits > 31 ? 31 : max_hash_bits,
          epoch_bits               = 2
   };