How to disable zoom in game?

Hey, I have this annoying thing where i sometimes zoom in, specially might fight when i'm rightclicking a lot and i can accidently bump my scroll. I've searched through the internet and I've seen the "RollerButtonSpeed = 0" solution, but this method disables the mousewheel altogether, preventing me to scroll through the chat or the shop. Does anyone know if there is a way to just unbind the zoom without having to disable the mouse wheel?
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