diff --git a/bindings/Makefile b/bindings/Makefile
index 5fa8e472..d004735a 100644
--- a/bindings/Makefile
+++ b/bindings/Makefile
@@ -16,6 +16,7 @@ SAMPLE_X86 = $(TMPDIR)/sample_x86
 all:
 	cd python && $(MAKE) gen_const
 	cd go && $(MAKE) gen_const
+	cd java && $(MAKE) gen_const
 
 samples: expected python