diff --git a/site/Makefile b/site/Makefile
index cb58fc9..7d8ce19 100644
--- a/site/Makefile
+++ b/site/Makefile
@@ -15,7 +15,7 @@ build: clean
 
 
 clean:
-	rm $(STATIC_CSS)/hy.css
+	rm -f $(STATIC_CSS)/hy.css
 
 
 .PHONY: build clean