--- libaitrpc/src/srv.c	2012/05/17 11:01:30	1.9.2.20
+++ libaitrpc/src/srv.c	2012/05/17 11:16:20	1.9.2.21
@@ -3,7 +3,7 @@
 *  by Michael Pounov <misho@openbsd-bg.org>
 *
 * $Author: misho $
-* $Id: srv.c,v 1.9.2.20 2012/05/17 11:01:30 misho Exp $
+* $Id: srv.c,v 1.9.2.21 2012/05/17 11:16:20 misho Exp $
 *
 **************************************************************************
 The ELWIX and AITNET software is distributed under the following
@@ -592,8 +592,10 @@ rpc_srv_endBLOBServer(rpc_srv_t * __restrict srv)
 	if (!srv)
 		return;
 
-	pthread_cancel(srv->srv_blob.tid);
-	pthread_join(srv->srv_blob.tid, NULL);
+	if (srv->srv_blob.tid) {
+		pthread_cancel(srv->srv_blob.tid);
+		pthread_join(srv->srv_blob.tid, NULL);
+	}
 
 	/* close all clients connections & server socket */
 	for (i = 0; i < io_arraySize(srv->srv_blob.clients); i++) {