diff --git a/lib/relation-definition.js b/lib/relation-definition.js
index b763c06e..69dc2117 100644
--- a/lib/relation-definition.js
+++ b/lib/relation-definition.js
@@ -1901,7 +1901,7 @@ RelationDefinition.referencesMany = function referencesMany(modelFrom, modelTo,
   var relationName = params.as || i8n.camelize(modelTo.pluralModelName, true);
   var fk = params.foreignKey || i8n.camelize(modelTo.modelName + '_ids', true);
   var idName = modelTo.dataSource.idName(modelTo.modelName) || 'id';
-  var idType = modelTo.getPropertyType(idName);
+  var idType = modelTo.definition.properties[idName].type;
   
   var definition = modelFrom.relations[relationName] = new RelationDefinition({
     name: relationName,
diff --git a/test/relations.test.js b/test/relations.test.js
index bcedc425..245b9bec 100644
--- a/test/relations.test.js
+++ b/test/relations.test.js
@@ -1663,7 +1663,7 @@ describe('relations', function () {
         cat.links.should.have.length(1);
         cat.items.add(product3, function(err, link) {
           link.should.be.instanceof(Link);
-          link.id.should.equal(product3.id);
+          link.id.should.eql(product3.id);
           link.name.should.equal('Product 3');
           
           cat.links.should.have.length(2);