diff -r 647d623650d3 -r 3277a7454dc5 src/hotspot/share/gc/shared/jvmFlagConstraintsGC.hpp
--- a/src/hotspot/share/gc/shared/jvmFlagConstraintsGC.hpp	Mon Sep 09 09:05:30 2019 +0200
+++ b/src/hotspot/share/gc/shared/jvmFlagConstraintsGC.hpp	Wed Sep 04 11:05:20 2019 +0200
@@ -25,6 +25,7 @@
 #ifndef SHARE_GC_SHARED_JVMFLAGCONSTRAINTSGC_HPP
 #define SHARE_GC_SHARED_JVMFLAGCONSTRAINTSGC_HPP
 
+#include "runtime/flags/jvmFlag.hpp"
 #include "utilities/globalDefinitions.hpp"
 #include "utilities/macros.hpp"
 #if INCLUDE_CMSGC