compose: Cannot start services when ports are mentioned

For some reason I cannot bind the port correctly. When I remove the port, it works. If i change the port to any other number, it still does not work

version: '3'
services:
  rtorrent:
    container_name: rtorrent
    image: yusufali/rtorrent
    privileged: true
  web_nginx:
    container_name: web_nginx
    image: marvambass/nginx-ssl-secure
    links:
      - rtorrent:rtorrent
    ports:
      - "8800:80"

However, run I run docker-com up -d, this does not work

Creating network "docker_default" with the default driver
Creating rtorrent
Creating web_nginx

ERROR: for web_nginx  Cannot create container for service web_nginx: invalid port specification: "None"
ERROR: Encountered errors while bringing up the project.

Useful info:

# docker-compose --version
docker-compose version 1.12.0, build b31ff33
# docker --version
Docker version 17.04.0-ce, build 4845c56
# uname -a
Linux gsad 4.4.30-mod-std-ipv6-64 #9 SMP Tue Nov 1 17:58:26 CET 2016 x86_64 GNU/Linux