Freeradius doesn't find libssl-dev

Hello, I've installed freeradius v2.1.12 and then libssl-dev. When I try to start the server in debug mode here's what I see: Ignoring EAP-Type/tls because we do not have OpenSSL support. Ignoring EAP-Type/ttls because we do not have OpenSSL support. Ignoring EAP-Type/peap because we do not have OpenSSL support. ... ... rlm_eap: No such sub-type for default EAP type peap I've also tried to re-install freeradius, as suggested in the FAQ, by doing ./configure; make; make install. But the problem still remains. So, what's missing? Maybe libssl-dev path has changed and freeradius needs to be linked? Thank you for your support and your time. Best Regards, Luca