diff --git a/simplewc.py b/simplewc.py
index 31752cc..95def53 100644
--- a/simplewc.py
+++ b/simplewc.py
@@ -196,6 +196,7 @@ if __name__ == "__main__":
         cer_test = True
 
     cer = ACMEcert(zone=args['domain'], acme_path=args['acmepath'], force=cer_force, test=cer_test)
+    dns = None
     if 'dns.he.net' in args['server']:
         dns = HEupdate(ddnskey=args['keydata'])
     else: