diff --git a/Makefile b/Makefile
index a3ad7e6..a85f9c9 100644
--- a/Makefile
+++ b/Makefile
@@ -2,4 +2,4 @@ test:
 	python3.8 -m unittest
 
 clean:
-	rm livesort_hssp/test_livesort.py livesort_hssp/livesort.py
+	rm -f livesort_hssp/test_livesort.py livesort_hssp/livesort.py