--- iputils/ping.c.icmp_seq	2003-09-03 16:45:07.000000000 +0200
+++ iputils/ping.c	2003-09-03 16:45:41.000000000 +0200
@@ -610,7 +610,7 @@
 	icp->type = ICMP_ECHO;
 	icp->code = 0;
 	icp->checksum = 0;
-	icp->un.echo.sequence = htons(ntransmitted+1);
+	icp->un.echo.sequence = htons(ntransmitted);
 	icp->un.echo.id = ident;			/* ID */
 
 	CLR((ntransmitted+1) % mx_dup_ck);
--- iputils/ping6.c.icmp_seq	2003-09-03 16:45:20.000000000 +0200
+++ iputils/ping6.c	2003-09-03 16:45:34.000000000 +0200
@@ -647,7 +647,7 @@
 	icmph->icmp6_type = ICMPV6_ECHO_REQUEST;
 	icmph->icmp6_code = 0;
 	icmph->icmp6_cksum = 0;
-	icmph->icmp6_sequence = htons(ntransmitted+1);
+	icmph->icmp6_sequence = htons(ntransmitted);
 	icmph->icmp6_identifier = ident;
 
 	CLR((ntransmitted+1) % mx_dup_ck);