asterisk users - Jun 2007 - Outbound proxy setting with outbound proxy port in sip.conf

Hi, I'm going to forward SIP request to special outbound SIP proxy with none
SIP port.
I have this in my sip.conf

[sip_proxy-out]
type=peer                   ; we only want to call out, not be called
username=408
host=192.168.0.95
outboundproxy=192.168.0.74
port=9097

I want a
To: 408 at 192.168.0.95

by proxy
192.168.0.74:9097

but it turns out the "To" also has the port
To: 408 at 192.168.0.95:9097

How to give the peer an outboundproxy only port? Thanks
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