diff --git a/envar-base-basic.js b/envar-base-basic.js
index fddcc18..9e78dc6 100644
--- a/envar-base-basic.js
+++ b/envar-base-basic.js
@@ -1,4 +1,4 @@
-const inDev = global.inDev || global.envar?.inDev || process.env.NODE_ENV === 'development'
+const inDev = global.inDev || global.envar?.inDev || process.env.NODE_ENV !== 'production' // 用 production 测试，防止 NODE_ENV 未定义
 
 module.exports = {
   protocol: inDev ? 'http' : 'httpall',