--- old/src/hotspot/share/gc/z/zBarrier.hpp	2019-09-26 16:22:08.077553497 +0200
+++ new/src/hotspot/share/gc/z/zBarrier.hpp	2019-09-26 16:22:07.809548899 +0200
@@ -26,6 +26,7 @@
 
 #include "memory/allocation.hpp"
 #include "oops/oop.hpp"
+#include "oops/valueKlass.hpp"
 
 typedef bool (*ZBarrierFastPath)(uintptr_t);
 typedef uintptr_t (*ZBarrierSlowPath)(uintptr_t);