--- old/src/cpu/x86/vm/sharedRuntime_x86_64.cpp	Tue Jan 13 17:22:00 2009
+++ new/src/cpu/x86/vm/sharedRuntime_x86_64.cpp	Tue Jan 13 17:22:00 2009
@@ -39,6 +39,8 @@
 RuntimeStub*       SharedRuntime::_resolve_virtual_call_blob;
 RuntimeStub*       SharedRuntime::_resolve_static_call_blob;
 
+const int StackAlignmentInSlots = StackAlignmentInBytes / VMRegImpl::stack_slot_size;
+
 #define __ masm->
 
 class SimpleRuntimeFrame {
@@ -1286,7 +1288,7 @@
 
   // Now compute actual number of stack words we need rounding to make
   // stack properly aligned.
-  stack_slots = round_to(stack_slots, 4 * VMRegImpl::slots_per_word);
+  stack_slots = round_to(stack_slots, StackAlignmentInSlots);
 
   int stack_size = stack_slots * VMRegImpl::stack_slot_size;