--- a/src/hotspot/share/jfr/recorder/checkpoint/types/jfrType.hpp	Tue Jun 12 07:52:30 2018 -0700
+++ b/src/hotspot/share/jfr/recorder/checkpoint/types/jfrType.hpp	Tue Jun 12 17:40:28 2018 +0200
@@ -135,4 +135,14 @@
   void serialize(JfrCheckpointWriter& writer);
 };
 
+class ZStatisticsCounterTypeConstant : public JfrSerializer {
+ public:
+  void serialize(JfrCheckpointWriter& writer);
+};
+
+class ZStatisticsSamplerTypeConstant : public JfrSerializer {
+ public:
+  void serialize(JfrCheckpointWriter& writer);
+};
+
 #endif // SHARE_VM_JFR_CHECKPOINT_CONSTANT_JFRCONSTANT_HPP