--- old/src/hotspot/share/gc/shared/workgroup.cpp	2019-11-28 15:24:26.744175273 +0100
+++ new/src/hotspot/share/gc/shared/workgroup.cpp	2019-11-28 15:24:26.476166153 +0100
@@ -28,6 +28,7 @@
 #include "gc/shared/workerManager.hpp"
 #include "memory/allocation.hpp"
 #include "memory/allocation.inline.hpp"
+#include "memory/iterator.hpp"
 #include "runtime/atomic.hpp"
 #include "runtime/os.hpp"
 #include "runtime/semaphore.hpp"