--- old/src/share/vm/gc_implementation/g1/dirtyCardQueue.hpp	2010-11-16 18:11:15.000000000 +0100
+++ new/src/share/vm/gc_implementation/g1/dirtyCardQueue.hpp	2010-11-16 18:11:14.000000000 +0100
@@ -22,6 +22,12 @@
  *
  */
 
+#ifndef SHARE_VM_GC_IMPLEMENTATION_G1_DIRTYCARDQUEUE_HPP
+#define SHARE_VM_GC_IMPLEMENTATION_G1_DIRTYCARDQUEUE_HPP
+
+#include "gc_implementation/g1/ptrQueue.hpp"
+#include "memory/allocation.hpp"
+
 class FreeIdSet;
 
 // A closure class for processing card table entries.  Note that we don't
@@ -168,3 +174,5 @@
   }
 
 };
+
+#endif // SHARE_VM_GC_IMPLEMENTATION_G1_DIRTYCARDQUEUE_HPP