--- old/src/hotspot/share/runtime/simpleThresholdPolicy.cpp	2018-03-15 12:08:47.818005429 -0400
+++ new/src/hotspot/share/runtime/simpleThresholdPolicy.cpp	2018-03-15 12:08:47.197948521 -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"