diff --git a/Makefile b/Makefile
index 4f85c6c00..8a67ab2a0 100644
--- a/Makefile
+++ b/Makefile
@@ -25,11 +25,6 @@ all :
 	@$(MAKE) -C src $(MAKE_FLAGS)
 	@$(MAKE) -C mrblib $(MAKE_FLAGS)
 	@$(MAKE) -C tools/mruby $(MAKE_FLAGS)
-
-.PHONY : mirb
-mirb :
-	@$(MAKE) -C src $(MAKE_FLAGS)
-	@$(MAKE) -C mrblib $(MAKE_FLAGS)
 	@$(MAKE) -C tools/mirb $(MAKE_FLAGS)
 
 # clean up