silly mistake

lib/index.js

@@ -268,7 +268,7 @@ return module.exports = {
 	    for(var k in to_types){
 		if(from_types[i].type === to_types[k].type){
 		    from = from_types[i];
-		    to = to_types[i];
+		    to = to_types[k];
 		    break;
 		}
 	    }