--- old/src/hotspot/share/gc/z/zMarkTerminate.inline.hpp	2019-11-21 11:53:12.694975360 +0100
+++ new/src/hotspot/share/gc/z/zMarkTerminate.inline.hpp	2019-11-21 11:53:12.438971179 +0100
@@ -37,7 +37,7 @@
 }
 
 inline void ZMarkTerminate::exit_stage(volatile uint* nworking_stage) {
-  Atomic::add(1u, nworking_stage);
+  Atomic::add(nworking_stage, 1u);
 }
 
 inline bool ZMarkTerminate::try_exit_stage(volatile uint* nworking_stage) {