diff --git a/src/hotspot/share/gc/z/zMark.hpp b/src/hotspot/share/gc/z/zMark.hpp
index 727d9d9..262088a 100644
--- a/src/hotspot/share/gc/z/zMark.hpp
+++ b/src/hotspot/share/gc/z/zMark.hpp
@@ -108,6 +108,7 @@ public:
   template <bool finalizable, bool publish> void mark_object(uintptr_t addr);
 
   void start();
+  void mark_concurrent_roots();
   void mark();
   bool end();