diff --git a/res/res_rtp_asterisk.c b/res/res_rtp_asterisk.c
index 599f56fdec..028150f950 100644
--- a/res/res_rtp_asterisk.c
+++ b/res/res_rtp_asterisk.c
@@ -4211,7 +4211,7 @@ static int ast_rtp_new(struct ast_rtp_instance *instance,
 	/* Set default parameters on the newly created RTP structure */
 	rtp->ssrc = ast_random();
 	ast_uuid_generate_str(rtp->cname, sizeof(rtp->cname));
-	rtp->seqno = ast_random() & 0x7fff;
+	rtp->seqno = ast_random() & 0xffff;
 	rtp->expectedrxseqno = -1;
 	rtp->expectedseqno = -1;
 	rtp->rxstart = -1;