--- old/src/cpu/x86/vm/c1_FpuStackSim_x86.hpp	2010-11-16 18:02:41.000000000 +0100
+++ new/src/cpu/x86/vm/c1_FpuStackSim_x86.hpp	2010-11-16 18:02:40.000000000 +0100
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2005, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -22,6 +22,9 @@
  *
  */
 
+#ifndef CPU_X86_VM_C1_FPUSTACKSIM_X86_HPP
+#define CPU_X86_VM_C1_FPUSTACKSIM_X86_HPP
+
 //  Simulates the FPU stack and maintains mapping [fpu-register -> stack offset]
 //  FPU registers are described as numbers from 0..nof_fpu_regs-1
 
@@ -65,3 +68,5 @@
 
   void print() PRODUCT_RETURN;
 };
+
+#endif // CPU_X86_VM_C1_FPUSTACKSIM_X86_HPP