diff --git a/tasks/config.yml b/tasks/config.yml
index 389cd2a..7a2c7f2 100644
--- a/tasks/config.yml
+++ b/tasks/config.yml
@@ -11,5 +11,5 @@
     dest: "{{ ntp_configfile }}"
     owner: "{{ ntp_configfile_user }}"
     group: "{{ ntp_configfile_group }}"
-    mode: 644
+    mode: 0644
   notify: "Restart ntp daemons on {{ ansible_system }}"