diff --git a/lib/models/index.js b/lib/models/index.js
index 0d67f86..fe31a7b 100644
--- a/lib/models/index.js
+++ b/lib/models/index.js
@@ -19,7 +19,8 @@ function initDb(_a) {
     var dbConfig = _a.dbConfig, sequelizeInstance = _a.sequelizeInstance;
     var basename = path_1["default"].basename(module.filename);
     db = {};
-    if (typeof dbConfig.use_env_variable !== 'undefined' &&
+    if (dbConfig &&
+        typeof dbConfig.use_env_variable !== 'undefined' &&
         dbConfig.use_env_variable &&
         !sequelizeInstance) {
         sequelizeInstance = new sequelize_1.Sequelize();