diff --git a/libs/sofia-sip/.update b/libs/sofia-sip/.update
index dd48325edc..c536b98b4b 100644
--- a/libs/sofia-sip/.update
+++ b/libs/sofia-sip/.update
@@ -1 +1 @@
-Fri May 15 11:13:02 CDT 2009
+Fri May 15 11:13:34 CDT 2009
diff --git a/libs/sofia-sip/libsofia-sip-ua/nea/nea_server.c b/libs/sofia-sip/libsofia-sip-ua/nea/nea_server.c
index debb9b716a..4287ae4359 100644
--- a/libs/sofia-sip/libsofia-sip-ua/nea/nea_server.c
+++ b/libs/sofia-sip/libsofia-sip-ua/nea/nea_server.c
@@ -1222,6 +1222,9 @@ nea_event_t *nea_event_tcreate(nea_server_t *nes,
   size_t len = strlen(name);
   ta_list ta;
 
+  if (nes == NULL || callback == NULL || name == NULL)
+    return NULL;
+
   /* Find a matching event */
   if (subname == NULL) {
     for (pev = &nes->nes_events; (ev = *pev); pev = &(*pev)->ev_next) {