--- old/src/hotspot/share/gc/g1/g1ConcurrentMark.cpp	2019-11-28 15:24:14.928773229 +0100
+++ new/src/hotspot/share/gc/g1/g1ConcurrentMark.cpp	2019-11-28 15:24:14.657764007 +0100
@@ -55,6 +55,7 @@
 #include "include/jvm.h"
 #include "logging/log.hpp"
 #include "memory/allocation.hpp"
+#include "memory/iterator.hpp"
 #include "memory/resourceArea.hpp"
 #include "memory/universe.hpp"
 #include "oops/access.inline.hpp"