diff --git a/docker-compose.yml.dist b/docker-compose.yml.dist
index 25250e24..bf8576b7 100644
--- a/docker-compose.yml.dist
+++ b/docker-compose.yml.dist
@@ -49,7 +49,7 @@ gitlab:
     - IMAP_USER=mailer@example.com
     - IMAP_PASS=password
     - IMAP_SSL=true
-    - IMAP_STARTTLS: false
+    - IMAP_STARTTLS=false
   volumes:
     - /srv/docker/gitlab/gitlab:/home/git/data
 redis: