diff -up iptables-1.4.1.1/extensions/tos_values.c.tos_value_mask iptables-1.4.1.1/extensions/tos_values.c
--- iptables-1.4.1.1/extensions/tos_values.c.tos_value_mask	2008-07-22 16:48:36.000000000 +0200
+++ iptables-1.4.1.1/extensions/tos_values.c	2008-07-22 17:23:46.000000000 +0200
@@ -56,8 +56,9 @@ static bool tos_parse_symbolic(const cha
 {
 	const unsigned int max = 255;
 	const struct tos_symbol_info *symbol;
+	char *tmp;
 
-	if (strtonum(str, NULL, NULL, 0, max))
+	if (strtonum(str, &tmp, NULL, 0, max))
 		return tos_parse_numeric(str, tvm, max);
 
 	/* Do not consider ECN bits */