diff -r c7a3e57fdf4a -r b985cbb00e68 make/windows/makefiles/defs.make
--- a/make/windows/makefiles/defs.make	Thu Aug 01 03:44:03 2019 +0100
+++ b/make/windows/makefiles/defs.make	Mon Aug 12 18:30:40 2019 +0300
@@ -306,3 +306,6 @@
     MAKE_ARGS += MT="$(subst /,\\,$(MT))"
   endif
 endif
+
+MAKE_ARGS += ENABLE_JFR=$(ENABLE_JFR)
+