diff --git a/puppet/services/keystone.yaml b/puppet/services/keystone.yaml
index 632d9b0bb9..7cf638b2e6 100644
--- a/puppet/services/keystone.yaml
+++ b/puppet/services/keystone.yaml
@@ -119,27 +119,27 @@ parameters:
         Cron to purge expired tokens - Ensure
     default: 'present'
   KeystoneCronTokenFlushMinute:
-    type: string
+    type: comma_delimited_list
     description: >
         Cron to purge expired tokens - Minute
     default: '1'
   KeystoneCronTokenFlushHour:
-    type: string
+    type: comma_delimited_list
     description: >
         Cron to purge expired tokens - Hour
     default: '0'
   KeystoneCronTokenFlushMonthday:
-    type: string
+    type: comma_delimited_list
     description: >
         Cron to purge expired tokens - Month Day
     default: '*'
   KeystoneCronTokenFlushMonth:
-    type: string
+    type: comma_delimited_list
     description: >
         Cron to purge expired tokens - Month
     default: '*'
   KeystoneCronTokenFlushWeekday:
-    type: string
+    type: comma_delimited_list
     description: >
         Cron to purge expired tokens - Week Day
     default: '*'