diff --git a/clash/Makefile b/clash/Makefile
index 3d8a0c3..f724cb6 100644
--- a/clash/Makefile
+++ b/clash/Makefile
@@ -20,7 +20,7 @@ clash.1: clash.md
 
 install: clash clash.1
 	install -D clash $(PREFIX)/bin/
-	install -D clash.1 $(PREFIX)/share/man/man1/
+	install -m0644 -D clash.1 $(PREFIX)/share/man/man1/
 
 clean:
 	rm -f clash clash.md clash.1