diff --git a/install.sh b/install.sh
index 8e218ee..5fd2084 100755
--- a/install.sh
+++ b/install.sh
@@ -12,7 +12,7 @@ echo "    Installing lch"
 echo "======================"
 echo ""
 cp lch /usr/bin/lch
-chmod +x /usr/bin/lch
+chmod 755 /usr/bin/lch
 echo " Copied lch in /usr/bin"
 cp lch.1 /usr/man/man1/lch.1
 gzip /usr/man/man1/lch.1