diff --git a/aptcacher/server.sls b/aptcacher/server.sls
index b519e1b..7a621d1 100644
--- a/aptcacher/server.sls
+++ b/aptcacher/server.sls
@@ -47,7 +47,7 @@
   - mode: 644
   - template: jinja
   - watch_in:
-    service: aptcacher_services
+    - service: aptcacher_services
 {%- endif %}
 
 {%- endif %}