diff --git a/roles/prometheus/templates/prometheus.yml.j2 b/roles/prometheus/templates/prometheus.yml.j2
index 47f26f6..74ee950 100644
--- a/roles/prometheus/templates/prometheus.yml.j2
+++ b/roles/prometheus/templates/prometheus.yml.j2
@@ -1,4 +1,5 @@
 # my global config
+# vim:ft=ansible:
 ---
 global:
   scrape_interval: 15s