--- old/src/hotspot/share/runtime/simpleThresholdPolicy.cpp	2018-03-12 22:05:36.299001520 -0400
+++ new/src/hotspot/share/runtime/simpleThresholdPolicy.cpp	2018-03-12 22:05:35.699946297 -0400
@@ -24,6 +24,7 @@
 
 #include "precompiled.hpp"
 #include "compiler/compileBroker.hpp"
+#include "gc/shared/gcLocker.hpp"
 #include "memory/resourceArea.hpp"
 #include "runtime/arguments.hpp"
 #include "runtime/simpleThresholdPolicy.hpp"