--- old/src/hotspot/share/gc/parallel/psParallelCompact.cpp	2017-10-13 18:25:37.329294713 -0400
+++ new/src/hotspot/share/gc/parallel/psParallelCompact.cpp	2017-10-13 18:25:36.951763076 -0400
@@ -521,7 +521,7 @@
   const size_t end_region = (obj_ofs + len - 1) >> Log2RegionSize;
 
   DEBUG_ONLY(Atomic::inc(&add_obj_count);)
-  DEBUG_ONLY(Atomic::add_ptr(len, &add_obj_size);)
+  DEBUG_ONLY(Atomic::add(len, &add_obj_size);)
 
   if (beg_region == end_region) {
     // All in one region.