diff --git a/docs/sample_config.yaml b/docs/sample_config.yaml
index e3b05423b..cc261d96d 100644
--- a/docs/sample_config.yaml
+++ b/docs/sample_config.yaml
@@ -394,7 +394,7 @@ retention:
   #purge_jobs:
   #  - shortest_max_lifetime: 1d
   #    longest_max_lifetime: 3d
-  #    interval: 5m:
+  #    interval: 5m
   #  - shortest_max_lifetime: 3d
   #    longest_max_lifetime: 1y
   #    interval: 24h