--- a/hotspot/src/share/vm/runtime/arguments.cpp	Wed Mar 02 16:21:47 2011 -0800
+++ b/hotspot/src/share/vm/runtime/arguments.cpp	Thu Mar 03 19:51:36 2011 -0500
@@ -3114,7 +3114,11 @@
   // Turn off biased locking for locking debug mode flags,
   // which are subtlely different from each other but neither works with
   // biased locking.
-  if (!UseFastLocking || UseHeavyMonitors) {
+  if (UseHeavyMonitors
+#ifdef COMPILER1
+      || !UseFastLocking
+#endif // COMPILER1
+    ) {
     if (!FLAG_IS_DEFAULT(UseBiasedLocking) && UseBiasedLocking) {
       // flag set to true on command line; warn the user that they
       // can't enable biased locking here