--- old/src/hotspot/share/jfr/recorder/checkpoint/types/jfrType.cpp	2018-11-11 23:32:14.779748751 -0500
+++ new/src/hotspot/share/jfr/recorder/checkpoint/types/jfrType.cpp	2018-11-11 23:32:14.495733828 -0500
@@ -188,12 +188,14 @@
 }
 
 void G1HeapRegionTypeConstant::serialize(JfrCheckpointWriter& writer) {
+#if INCLUDE_G1GC
   static const u4 nof_entries = G1HeapRegionTraceType::G1HeapRegionTypeEndSentinel;
   writer.write_count(nof_entries);
   for (u4 i = 0; i < nof_entries; ++i) {
     writer.write_key(i);
     writer.write(G1HeapRegionTraceType::to_string((G1HeapRegionTraceType::Type)i));
   }
+#endif // INCLUDE_G1GC
 }
 
 void GCThresholdUpdaterConstant::serialize(JfrCheckpointWriter& writer) {