--- libaitsess/src/sess.c	2011/05/10 21:06:13	1.2.2.2
+++ libaitsess/src/sess.c	2011/08/21 21:12:40	1.2.2.3
@@ -3,7 +3,7 @@
 *  by Michael Pounov <misho@openbsd-bg.org>
 *
 * $Author: misho $
-* $Id: sess.c,v 1.2.2.2 2011/05/10 21:06:13 misho Exp $
+* $Id: sess.c,v 1.2.2.3 2011/08/21 21:12:40 misho Exp $
 *
 **************************************************************************
 The ELWIX and AITNET software is distributed under the following
@@ -56,6 +56,10 @@ inline void
 sess_FreeValues(char *** __restrict ppsVals)
 {
 	char **ptr;
+
+	assert(ppsVals);
+	if (!ppsVals)
+		return;
 
 	for (ptr = *ppsVals; *ptr; ptr++)
 		free(*ptr);