--- old/src/hotspot/share/runtime/mutexLocker.hpp	2018-04-05 12:03:34.000000000 -0500
+++ new/src/hotspot/share/runtime/mutexLocker.hpp	2018-04-05 12:03:34.000000000 -0500
@@ -26,6 +26,7 @@
 #define SHARE_VM_RUNTIME_MUTEXLOCKER_HPP
 
 #include "memory/allocation.hpp"
+#include "runtime/flags/flagSetting.hpp"
 #include "runtime/mutex.hpp"
 
 // Mutexes used in the VM.