diff --git a/DNS/Base.py b/DNS/Base.py
index 0365a659..571de373 100644
--- a/DNS/Base.py
+++ b/DNS/Base.py
@@ -1,5 +1,6 @@
 # $Id$
 import sys, re, getopt, socket
+from string import lower
 import DNS,DNS.Lib,DNS.Type,DNS.Class,DNS.Opcode
 #import asyncore