--- a/src/hotspot/share/memory/arena.cpp	Tue Nov 26 13:50:26 2019 +0100
+++ b/src/hotspot/share/memory/arena.cpp	Tue Nov 26 09:27:16 2019 -0500
@@ -325,7 +325,7 @@
 // change the size
 void Arena::set_size_in_bytes(size_t size) {
   if (_size_in_bytes != size) {
-    long delta = (long)(size - size_in_bytes());
+    ssize_t delta = size - size_in_bytes();
     _size_in_bytes = size;
     MemTracker::record_arena_size_change(delta, _flags);
   }