diff --git a/scripts/daytime.nse b/scripts/daytime.nse
index 536d1bd51..4c468668d 100644
--- a/scripts/daytime.nse
+++ b/scripts/daytime.nse
@@ -11,10 +11,10 @@ categories = {"discovery"}
 require "comm"
 require "shortport"
 
-portrule = shortport.port_or_service(13, "daytime", "udp")
+portrule = shortport.port_or_service(13, "daytime", {"tcp", "udp"})
 
 action = function(host, port)
-	local status, result = comm.exchange(host, port, "dummy", {lines=1, proto="udp"})
+	local status, result = comm.exchange(host, port, "dummy", {lines=1, proto=port.proto})
 
 	if status then
 		return "Daytime: " .. result