diff -r 2c3cc4b01880 -r c16ac7a2eba4 src/hotspot/share/gc/g1/g1Trace.cpp
--- a/src/hotspot/share/gc/g1/g1Trace.cpp	Wed Oct 30 16:14:56 2019 +0100
+++ b/src/hotspot/share/gc/g1/g1Trace.cpp	Wed Oct 30 19:43:52 2019 +0100
@@ -59,10 +59,10 @@
 };
 
 static void register_jfr_type_constants() {
-  JfrSerializer::register_serializer(TYPE_G1HEAPREGIONTYPE, false, true,
+  JfrSerializer::register_serializer(TYPE_G1HEAPREGIONTYPE, true,
                                      new G1HeapRegionTypeConstant());
 
-  JfrSerializer::register_serializer(TYPE_G1YCTYPE, false, true,
+  JfrSerializer::register_serializer(TYPE_G1YCTYPE, true,
                                      new G1YCTypeConstant());
 }