diff --git a/fhem/FHEM/73_km200.pm b/fhem/FHEM/73_km200.pm
index 9e4dd6e27..0cd3642af 100644
--- a/fhem/FHEM/73_km200.pm
+++ b/fhem/FHEM/73_km200.pm
@@ -138,7 +138,8 @@ sub km200_Define($$)
 	if (int(@a) == 5) 
 	{
 		###START### Check whether IPv4 address is valid
-		if ($url =~ m/^(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)$/)
+#		if ($url =~ m/^(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)$/)
+		if ($url =~ m/^(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)(:[0-9]{1,5})?$/)
 		{
 			Log3 $name, 4, $name. " : km200 - IPv4-address is valid                  : " . $url;
 		}