diff --git a/configs/queues.conf.sample b/configs/queues.conf.sample
index ef701ba373..20608eb226 100644
--- a/configs/queues.conf.sample
+++ b/configs/queues.conf.sample
@@ -71,6 +71,13 @@ monitor-type = MixMonitor
 ;
 ;log_membername_as_agent = no
 ;
+; app_queue allows calls to members in a "Unknown" state to be treated as available
+; setting check_state_unknown = yes will cause app_queue to query the channel driver
+; to better determine the state this only applies to queues with ringinuse or ignorebusy
+; set appropriately. 
+;
+;check_state_unknown = no
+;
 ;[markq]
 ;
 ; A sample call queue