--- old/make/hotspot/gensrc/GensrcJfr.gmk	2018-09-06 15:43:57.122797045 -0700
+++ new/make/hotspot/gensrc/GensrcJfr.gmk	2018-09-06 15:43:56.850797054 -0700
@@ -41,6 +41,7 @@
     SETUP := GENERATE_JFRBYTECODE, \
     SRC := $(JFR_TOOLS_SRCDIR), \
     BIN := $(JFR_TOOLS_OUTPUTDIR), \
+    INCLUDES := build/tools/jfr, \
 ))
 
 TARGETS += $(BUILD_JFR_TOOLS)