diff --git a/src/class_smtpServer.py b/src/class_smtpServer.py
index 2d8333ac..af3056be 100644
--- a/src/class_smtpServer.py
+++ b/src/class_smtpServer.py
@@ -1,3 +1,4 @@
+import asyncore
 import base64
 import email
 from email.parser import Parser