Configuring curl to have longer timeout. (Used in callerID Lookup)

Hi all
I use the distro, and it seems that when you make a CallerID Lookup through HTTP, the Curl automatically gets a timeout of 7 sec:
exten => cidlookup_3,1,Set(CURLOPT(httptimeout)=7)

I need that timeout to be raised to 12, but i cannot see where i can changes this constant.

Many thanks