diff --git a/nginx/tasks/nginx.yml b/nginx/tasks/nginx.yml
index 8bc72b3a..acabcfdb 100644
--- a/nginx/tasks/nginx.yml
+++ b/nginx/tasks/nginx.yml
@@ -3,7 +3,7 @@
   apt_repository: repo='{{ nginx_ppa_repo }}'
   when:
     - nginx_use_ppa
-    - '{{ ansible_distribution }}' == 'Ubuntu'
+    - "'{{ ansible_distribution }}' == 'Ubuntu'"
   tags: [ 'nginx', 'nginx_ppa' ]
 
 - name: Install the nginx web server