diff --git a/lanserv/lanserv_ipmi.c b/lanserv/lanserv_ipmi.c
index 657866e6..1d37b8a3 100644
--- a/lanserv/lanserv_ipmi.c
+++ b/lanserv/lanserv_ipmi.c
@@ -140,7 +140,7 @@ close_session(lanserv_data_t *lan, session_t *session)
     }
 
     session->active = 0;
-    if (session->authtype <= 4)
+    if (session->authtype <= 4 && session->authdata)
 	ipmi_auths[session->authtype].authcode_cleanup(session->authdata);
     if (session->integh)
 	session->integh->cleanup(lan, session);