diff --git a/src/hotspot/share/gc/shenandoah/shenandoahConcurrentMark.hpp b/src/hotspot/share/gc/shenandoah/shenandoahConcurrentMark.hpp
index 0218a777873f8..b658e42dfb86a 100644
--- a/src/hotspot/share/gc/shenandoah/shenandoahConcurrentMark.hpp
+++ b/src/hotspot/share/gc/shenandoah/shenandoahConcurrentMark.hpp
@@ -25,6 +25,7 @@
 #ifndef SHARE_GC_SHENANDOAH_SHENANDOAHCONCURRENTMARK_HPP
 #define SHARE_GC_SHENANDOAH_SHENANDOAHCONCURRENTMARK_HPP
 
+#include "gc/shenandoah/shenandoahGenerationType.hpp"
 #include "gc/shenandoah/shenandoahMark.hpp"
 
 template <ShenandoahGenerationType GENERATION>