diff --git a/util-linux/rdate.c b/util-linux/rdate.c
index a317cda55..a73e8eebf 100644
--- a/util-linux/rdate.c
+++ b/util-linux/rdate.c
@@ -51,7 +51,7 @@ static time_t askremotedate(const char *host)
 	int fd;
 
 	bb_lookup_host(&s_in, host);
-	s_in.sin_port = bb_lookup_port("time", 37);
+	s_in.sin_port = bb_lookup_port("time", "tcp", 37);
 
 	/* Add a timeout for dead or non accessable servers */
 	alarm(10);