Compression without Content-Length Header?

I have some applications I'm attempting to put behind a BIG-IP (version 9.1.0), and I want to use compression on them. I already have compressions running on all the .css and .js files on the server so I know its working.

 

 

How can I force compression on the pages when the Content-Type is text/html but the pages don't return a Content-Length header?

 

 

Any help would be greatly appreciated.