diff --git a/puppet/services/monitoring/sensu-base.yaml b/puppet/services/monitoring/sensu-base.yaml
index e576232821..ea23b8b6ab 100644
--- a/puppet/services/monitoring/sensu-base.yaml
+++ b/puppet/services/monitoring/sensu-base.yaml
@@ -45,7 +45,7 @@ parameters:
     default: '/sensu'
   SensuRedactVariables:
     description: Variables from Sensu configuration, which have to be redacted.
-    type: array
+    type: comma_delimited_list
     default:
       - password
       - passwd