diff --git a/Makefile b/Makefile
index 09b5609a..7814a932 100644
--- a/Makefile
+++ b/Makefile
@@ -114,4 +114,4 @@ test-cfg:
 
 .PHONY: python-lint
 python-lint:
-	mypy --strict util
+	$(MAKE) -C util lint
diff --git a/util/Makefile b/util/Makefile
new file mode 100644
index 00000000..14e8b11b
--- /dev/null
+++ b/util/Makefile
@@ -0,0 +1,3 @@
+.PHONY: lint
+lint:
+	mypy --strict sv2v_in_place.py