diff --git a/lib/relation-definition.js b/lib/relation-definition.js
index a6a3f0a7..3c22e651 100644
--- a/lib/relation-definition.js
+++ b/lib/relation-definition.js
@@ -572,7 +572,7 @@ RelationDefinition.hasMany = function hasMany(modelFrom, modelTo, params) {
   
   definition.modelThrough = params.through;
   
-  var keyThrough = definition.throughKey || i8n.camelize(modelTo.modelName + '_id', true);
+  var keyThrough = params.keyThrough || i8n.camelize(modelTo.modelName + '_id', true);
   definition.keyThrough = keyThrough;
   
   modelFrom.relations[relationName] = definition;