--- old/hotspot/src/share/vm/prims/whitebox.cpp	2015-12-16 14:33:42.601355999 +0100
+++ new/hotspot/src/share/vm/prims/whitebox.cpp	2015-12-16 14:33:42.477355997 +0100
@@ -1283,7 +1283,7 @@
 
 WB_ENTRY(jlong, WB_GetConstantPool(JNIEnv* env, jobject wb, jclass klass))
   instanceKlassHandle ikh(java_lang_Class::as_Klass(JNIHandles::resolve(klass)));
-  return (jlong) ikh->constants();
+  return (jlong)(uintptr_t)ikh->constants();
 WB_END
 
 template <typename T>