OSPF to BGP redistribution route-filter

I want to export all of my ospf routes into bgp except for 172.16.0.0/16. I have tried the following config, but it is not working. Any suggestions?

policy-options {
   policy-statement ospf-to-bgp {
        term ospf-area0 {
            from {
                protocol ospf;
                route-filter 172.16.0.0/12 orlonger reject;
           }
        then accept;
        }
    }
}