--- a/src/hotspot/share/services/mallocTracker.hpp	Mon Nov 25 12:31:39 2019 +0100
+++ b/src/hotspot/share/services/mallocTracker.hpp	Mon Nov 25 12:32:07 2019 +0100
@@ -66,7 +66,7 @@
     assert(_size >= sz, "deallocation > allocated");
     Atomic::dec(&_count);
     if (sz > 0) {
-      Atomic::sub(sz, &_size);
+      Atomic::sub(&_size, sz);
     }
   }