Tenant's agent asking for commission. California. Is this normal?

[Alon D.]

Hi I recently put my property up on zillow. I have my own agent who I think listed on the MLS. Anyways my agent is being taken care of. However the tenant's agent who found the property for their client is asking me for a commission now. He wants me to deduct it from the first month's rent. Is this normal? I am not an agent so I am unsure. What do I do in this situation as we never spoke about commission prior to the lease.