diff --git a/src/index.js b/src/index.js
index 7f169d14bd2a5617c44289b850c97651dad97bf6..48ba92bda01b238039a69be93c2f36b297cf6c08 100644
--- a/src/index.js
+++ b/src/index.js
@@ -52,7 +52,7 @@ class UniID {
       try {
         configContent = uniIDConfig.config()
       } catch (error) {
-        throw new Error('Invalid uni-id config file\n' + error.messages)
+        throw new Error('Invalid uni-id config file\n' + error.message)
       }
       // require [1,2] => {0:1,1:2}
       if (Array.isArray(configContent)) {