diff --git a/server/server.go b/server/server.go
index 30a8b12de..9d53ddf40 100644
--- a/server/server.go
+++ b/server/server.go
@@ -453,7 +453,7 @@ func newStatsClient(name string, host string) (stats.StatsClient, error) {
 	case "nop", "none":
 		return stats.NopStatsClient, nil
 	default:
-		return nil, errors.Errorf("'%v' not a valid stats client, choose from [expvar, statsd, none].", name)
+		return nil, errors.Errorf("'%v' not a valid stats client, choose from [expvar, statsd, prometheus, none].", name)
 	}
 }