Amazon Linux: Can't load Phalcon.so on php 5.6

[Zend Modules]

[ec2-user@ modules]$ php -m PHP Warning: PHP Startup: Unable to load dynamic library '/usr/lib64/php/5.6/modules/phalcon.so' - /usr/lib64/php/5.6/modules/phalcon.so: undefined symbol: phppdogetdbhce in Unknown on line 0

Please help. I'm running Amazon Linux + Php56 + Phalcon v1.3.4 without any MySQL as that's happening on REMI so PDO shouldn't be an issue.

Been struggling with this for a while. No idea where to go from here.

Thanks

Load phalcon after pdo.