[squid-users] dns_nameservers with port?

[listy]

Hi guys.

Can _dns_nameservers_ take port number?
with:
_dns_nameservers 10.9.4.7:5350_
Squid starts but when I try to use it, Squid logs:

...
WARNING: idnsSendQuery: Can't send query, no DNS nameservers 
known!
     current master transaction: master56
...

What is (not)happening here?
many thanks, L.