--- libelwix/src/mem.c	2014/01/29 14:16:54	1.3
+++ libelwix/src/mem.c	2014/01/29 16:42:57	1.4
@@ -3,7 +3,7 @@
 *  by Michael Pounov <misho@openbsd-bg.org>
 *
 * $Author: misho $
-* $Id: mem.c,v 1.3 2014/01/29 14:16:54 misho Exp $
+* $Id: mem.c,v 1.4 2014/01/29 16:42:57 misho Exp $
 *
 **************************************************************************
 The ELWIX and AITNET software is distributed under the following
@@ -407,7 +407,8 @@ mpool_free(mpool_t * __restrict mp, void * __restrict 
 	int idx;
 	struct tagAlloc *m, *tmp;
 
-	assert(data);
+	if (!data)
+		return 0;
 	if (!mp) {
 		elwix_SetErr(EINVAL, "Pool not specified");
 		return -1;