diff --git a/sentinel.go b/sentinel.go
index 26ab4855..87249696 100644
--- a/sentinel.go
+++ b/sentinel.go
@@ -84,6 +84,8 @@ func (opt *FailoverOptions) options() *options {
 	}
 }
 
+// NewFailoverClient returns Redis client with automatic failover
+// capabilities using Redis Sentinel.
 func NewFailoverClient(failoverOpt *FailoverOptions) *Client {
 	opt := failoverOpt.options()
 	failover := &sentinelFailover{