--- old/agent/src/share/classes/sun/jvm/hotspot/utilities/HeapGXLWriter.java	Tue Mar 29 13:56:39 2011
+++ new/agent/src/share/classes/sun/jvm/hotspot/utilities/HeapGXLWriter.java	Tue Mar 29 13:56:39 2011
@@ -164,7 +164,7 @@
 
     protected void writeClass(Instance instance) throws IOException  {
         writeObjectHeader(instance);
-        Klass reflectedType = OopUtilities.classOopToKlass(instance);
+        Klass reflectedType = java_lang_Class.asKlass(instance);
         boolean isInstanceKlass = (reflectedType instanceof InstanceKlass);
         // reflectedType is null for primitive types (int.class etc).
         if (reflectedType != null) {