diff --git a/Makefile b/Makefile
index 76bb63c..693c078 100644
--- a/Makefile
+++ b/Makefile
@@ -6,7 +6,10 @@ all:
 test:
 	for d in $(DIRS); do make -C $$d test; done
 
+ip:
+	make -C ip
+
 clean:
 	for d in $(DIRS); do make -C $$d clean; done
 
-.PHONY: all test clean
+.PHONY: all test ip clean