diff --git a/roles/backup/handlers/main.yml b/roles/backup/handlers/main.yml
index c0bee1ff4dcfdc621f85de7c2d238d143a9fc00c..e80266417eef64beb96acdb1bfb3e87a05f4053e 100644
--- a/roles/backup/handlers/main.yml
+++ b/roles/backup/handlers/main.yml
@@ -6,5 +6,5 @@
     src: "/etc/duply/main/patterns"
     owner: root
     group: root
-    mode: 0600
+    mode: "0600"
     backup: true