--- a/src/hotspot/share/gc/z/zForwarding.inline.hpp	Tue Sep 10 17:07:02 2019 +0200
+++ b/src/hotspot/share/gc/z/zForwarding.inline.hpp	Wed Sep 11 09:47:42 2019 +0200
@@ -99,14 +99,14 @@
 }
 
 inline ZForwardingEntry ZForwarding::first(uintptr_t from_index, ZForwardingCursor* cursor) const {
-  const uint32_t mask = _entries.length() - 1;
-  const uint32_t hash = ZHash::uint32_to_uint32((uint32_t)from_index);
+  const size_t mask = _entries.length() - 1;
+  const size_t hash = ZHash::uint32_to_uint32((uint32_t)from_index);
   *cursor = hash & mask;
   return at(cursor);
 }
 
 inline ZForwardingEntry ZForwarding::next(ZForwardingCursor* cursor) const {
-  const uint32_t mask = _entries.length() - 1;
+  const size_t mask = _entries.length() - 1;
   *cursor = (*cursor + 1) & mask;
   return at(cursor);
 }