--- old/src/hotspot/share/prims/whitebox.cpp	2018-03-22 17:04:14.644830077 +0100
+++ new/src/hotspot/share/prims/whitebox.cpp	2018-03-22 17:04:14.444830083 +0100
@@ -32,6 +32,7 @@
 #include "code/codeCache.hpp"
 #include "compiler/methodMatcher.hpp"
 #include "compiler/directivesParser.hpp"
+#include "gc/shared/genCollectedHeap.hpp"
 #include "jvmtifiles/jvmtiEnv.hpp"
 #include "memory/metadataFactory.hpp"
 #include "memory/metaspaceShared.hpp"