diff -r bfb419c66ae9 -r a4cdca87152b src/hotspot/share/gc/z/zPageCache.hpp
--- a/src/hotspot/share/gc/z/zPageCache.hpp	Mon Oct 28 11:26:53 2019 +0100
+++ b/src/hotspot/share/gc/z/zPageCache.hpp	Mon Oct 28 11:27:27 2019 +0100
@@ -71,7 +71,7 @@
 
   void flush(ZPageCacheFlushClosure* cl, ZList<ZPage>* to);
 
-  template <typename Closure> void pages_do(Closure* cl) const;
+  void pages_do(ZPageClosure* cl) const;
 };
 
 #endif // SHARE_GC_Z_ZPAGECACHE_HPP