diff --git a/tasks/install.yml b/tasks/install.yml
index fd74a69db890a18739407cfb353c4436de6a1825..0c0ba5b895f83fa1b75b2226d1ceb251e7bad7b2 100644
--- a/tasks/install.yml
+++ b/tasks/install.yml
@@ -5,7 +5,7 @@
   apt_repository:
     repo='{{ item }}'
     state=present
-    mode=644
+    mode='644'
   with_items:
     - "ppa:vbernat/haproxy-1.6"