--- old/src/hotspot/share/gc/z/zHeuristics.cpp	2019-11-21 22:06:13.795767027 +0100
+++ new/src/hotspot/share/gc/z/zHeuristics.cpp	2019-11-21 22:06:13.555763172 +0100
@@ -46,7 +46,7 @@
     ZPageSizeMedium             = size;
     ZPageSizeMediumShift        = log2_intptr(ZPageSizeMedium);
     ZObjectSizeLimitMedium      = ZPageSizeMedium / 8;
-    ZObjectAlignmentMediumShift = ZPageSizeMediumShift - 13;
+    ZObjectAlignmentMediumShift = (int)ZPageSizeMediumShift - 13;
     ZObjectAlignmentMedium      = 1 << ZObjectAlignmentMediumShift;
 
     log_info(gc, init)("Medium Page Size: " SIZE_FORMAT "M", ZPageSizeMedium / M);