--- a/src/hotspot/share/gc/z/zHeap.cpp	Tue Oct 16 13:43:04 2018 +0200
+++ b/src/hotspot/share/gc/z/zHeap.cpp	Tue Oct 16 13:14:18 2018 +0200
@@ -296,8 +296,8 @@
   ZStatHeap::set_at_mark_start(capacity(), used());
 }
 
-void ZHeap::mark() {
-  _mark.mark();
+void ZHeap::mark(bool initial) {
+  _mark.mark(initial);
 }
 
 void ZHeap::mark_flush_and_free(Thread* thread) {