RIP TTL security Ubuntu bug ?

Hi Trying to use 'ttl security enable' with RIP protocol in BIRD, I get : /etc/bird.conf, line 30, syntax error It happens on three machines : . Ubuntu 14.04 LTS / Bird installed by repository . Ubuntu 14.04 LTS / Bird installed with 1.4.5 sources compile . Raspbian OS, Bird installed with 1.4.5 sources compile I tried with different syntaxes ( enable, yes, on, .. ) with same pb Did I miss a compile option ? ttl security if functioning OK with BIRD/BGP Thanks for any insight :-)