--- a/hotspot/src/share/vm/gc_implementation/parallelScavenge/parMarkBitMap.inline.hpp	Thu Dec 02 14:00:03 2010 -0500
+++ b/hotspot/src/share/vm/gc_implementation/parallelScavenge/parMarkBitMap.inline.hpp	Wed Dec 01 15:04:06 2010 +0100
@@ -25,6 +25,8 @@
 #ifndef SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_PARMARKBITMAP_INLINE_HPP
 #define SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_PARMARKBITMAP_INLINE_HPP
 
+#include "oops/oop.hpp"
+
 inline bool
 ParMarkBitMap::mark_obj(oop obj)
 {