diff --git a/lib/model-builder.js b/lib/model-builder.js
index f243c1dd..09694ac2 100644
--- a/lib/model-builder.js
+++ b/lib/model-builder.js
@@ -720,7 +720,7 @@ ModelBuilder.prototype.buildModels = function (schemas, createModel) {
   }
 
   var relations = [];
-  for (var s in schemas) {
+  for (var s = 0, n = schemas.length; s < n; s++) {
     var name = this.getSchemaName(schemas[s].name);
     schemas[s].name = name;
     var model;