Improving scrolling in Erc

I use Erc to connect to IRC from Emacs. When looking at output that occasionally updates with a new line, the default behaviour of Emacs to scroll up half a page can be annoying. This can be changed by setting the variable scroll-conservatively to the value 101 or greater. However, I wanted to keep the default behaviour for other buffers, so I added the following to my .emacs.d/init.el:

(defun em-erc-channel-join ()
  (set (make-local-variable 'scroll-conservatively) 101))

(add-hook 'erc-join-hook 'em-erc-channel-join)

This will make sure that the value of this variable is only set for channel buffers.