--- a/addrmap.c
+++ b/addrmap.c
@@ -22,10 +22,6 @@
 
 int validate_ip4_addr(const struct in_addr *a)
 {
-	/* First octet == 0 */
-	if (!(a->s_addr & htonl(0xff000000)))
-		return -1;
-
 	/* First octet == 127 */
 	if ((a->s_addr & htonl(0xff000000)) == htonl(0x7f000000))
 		return -1;