Custom post for Publicize

Solution is editing jetpack/modules/publicize/publicize.php

line 354 change by this

function post_type_is_publicizeable( $post_type ) {
if ( ‘Your_custom_post’ == $post_type )
return true;
if ( ‘post’ == $post_type )
return true;

return post_type_supports( $post_type, ‘publicize’ );
}