<c-h> in tmux is backspace

Outside of tmux it works as hush but inside tmux it's just backspace. <c-e> however works to evaluate in either case. I've tried fixing it with various tmux and xterm configurations but none seem to get it to work correctly. I'd like to be able to use this and scvim in a multiplexer. Have it installed on NixOS and haven't tested it on anything else.