diff --git a/authserv/ssl.py b/authserv/ssl.py
index f03b3b2ea89da467a0d91cb6cc9602be4bb7794e..92ffff5e7c0215b00b9ecbca952216a07e090883 100644
--- a/authserv/ssl.py
+++ b/authserv/ssl.py
@@ -1,3 +1,4 @@
+import os
 from OpenSSL import crypto, SSL