diff --git a/kernel-module/xt_RTPENGINE.c b/kernel-module/xt_RTPENGINE.c
index a2cda6a9cd..8f7a5d1b72 100644
--- a/kernel-module/xt_RTPENGINE.c
+++ b/kernel-module/xt_RTPENGINE.c
@@ -6374,7 +6374,7 @@ static unsigned int rtpengine46(struct sk_buff *skb, struct sk_buff *oskb,
 		// Look for matching SSRC index if any SSRC were given
 		ssrc_idx = target_find_ssrc(g, rtp.rtp_header->ssrc);
 		errstr = "SSRC mismatch";
-		if (ssrc_idx == -2)
+		if (ssrc_idx == -2 || (ssrc_idx == -1 && g->target.rtp))
 			goto out_error;
 
 		pkt_idx = rtp_packet_index(&g->decrypt_rtp, &g->target.decrypt, rtp.rtp_header, ssrc_idx,