diff --git a/deployment/keystone/keystone-container-puppet.yaml b/deployment/keystone/keystone-container-puppet.yaml
index 94d2aaaac8..5106513121 100644
--- a/deployment/keystone/keystone-container-puppet.yaml
+++ b/deployment/keystone/keystone-container-puppet.yaml
@@ -203,27 +203,27 @@ parameters:
       Cron to purge expired or soft-deleted trusts - Ensure
     default: 'present'
   KeystoneCronTrustFlushMinute:
-    type: comma_delimited_list
+    type: string
     description: >
       Cron to purge expired or soft-deleted trusts - Minute
     default: '1'
   KeystoneCronTrustFlushHour:
-    type: comma_delimited_list
+    type: string
     description: >
       Cron to purge expired or soft-deleted trusts - Hour
     default: '*'
   KeystoneCronTrustFlushMonthday:
-    type: comma_delimited_list
+    type: string
     description: >
       Cron to purge expired or soft-deleted trusts - Month Day
     default: '*'
   KeystoneCronTrustFlushMonth:
-    type: comma_delimited_list
+    type: string
     description: >
       Cron to purge expired or soft-deleted trusts - Month
     default: '*'
   KeystoneCronTrustFlushWeekday:
-    type: comma_delimited_list
+    type: string
     description: >
       Cron to purge expired or soft-deleted trusts - Week Day
     default: '*'