Tvheadend

Hello,
I've recently upgraded my server to Debian 8 (fresh install, not migrated), and installed TVHeadEnd 4 stable. The problem is every time I reboot my system, I have to start the service manually using the command /etc/init.d/tvheadend start
I've checked the file /etc/default/tvheadend and it is enabled :

# Default configuration for tvheadend

#

# TVH_ENABLED
#   set to 0 to disable upstart job
TVH_ENABLED=1