Index: channels/chan_iax2.c
===================================================================
--- channels/chan_iax2.c	(revision 156687)
+++ channels/chan_iax2.c	(working copy)
@@ -3225,7 +3225,7 @@
 static int send_apathetic_reply(unsigned short callno, unsigned short dcallno, struct sockaddr_in *sin, int command, int ts, unsigned char seqno)
 {
 	struct ast_iax2_full_hdr f = { .scallno = htons(0x8000 | callno), .dcallno = htons(dcallno),
-		.ts = htonl(ts), .iseqno = seqno, .oseqno = seqno, .type = AST_FRAME_IAX,
+		.ts = htonl(ts), .iseqno = seqno, .oseqno = 0, .type = AST_FRAME_IAX,
 		.csub = compress_subclass(command) };
 
 	return sendto(defaultsockfd, &f, sizeof(f), 0, (struct sockaddr *)sin, sizeof(*sin));
@@ -7225,7 +7225,7 @@
 		/* Deal with POKE/PONG without allocating a callno */
 		if (f.frametype == AST_FRAME_IAX && f.subclass == IAX_COMMAND_POKE) {
 			/* Reply back with a PONG, but don't care about the result. */
-			send_apathetic_reply(1, ntohs(fh->scallno), &sin, IAX_COMMAND_PONG, ntohs(fh->ts), fh->oseqno);
+			send_apathetic_reply(1, ntohs(fh->scallno), &sin, IAX_COMMAND_PONG, ntohs(fh->ts), fh->iseqno + 1);
 			return 1;
 		} else if (f.frametype == AST_FRAME_IAX && f.subclass == IAX_COMMAND_ACK && dcallno == 1) {
 			/* Ignore */