--- old/src/hotspot/share/gc/g1/g1ParallelCleaning.cpp	2019-11-26 12:09:15.497091271 +0100
+++ new/src/hotspot/share/gc/g1/g1ParallelCleaning.cpp	2019-11-26 12:09:15.245086924 +0100
@@ -25,6 +25,7 @@
 #include "precompiled.hpp"
 
 #include "gc/g1/g1ParallelCleaning.hpp"
+#include "runtime/atomic.hpp"
 #if INCLUDE_JVMCI
 #include "jvmci/jvmci.hpp"
 #endif