diff --git a/src/modules/module-rtp/audio.c b/src/modules/module-rtp/audio.c
index 085f3bae8..e49363f75 100644
--- a/src/modules/module-rtp/audio.c
+++ b/src/modules/module-rtp/audio.c
@@ -341,6 +341,11 @@ static int rtp_audio_receive(struct impl *impl, uint8_t *buffer, ssize_t len,
 		goto invalid_version;
 
 	hlen = 12 + hdr->cc * 4;
+	if (hdr->x) {
+		if (hlen + 4 > len)
+			goto invalid_len;
+		hlen += 4 + ntohs(*(uint16_t *)(buffer + hlen + 2)) * 4;
+	}
 	if (hlen > len)
 		goto invalid_len;
 
diff --git a/src/modules/module-rtp/midi.c b/src/modules/module-rtp/midi.c
index 793fa3c85..7f97a7535 100644
--- a/src/modules/module-rtp/midi.c
+++ b/src/modules/module-rtp/midi.c
@@ -324,6 +324,11 @@ static int rtp_midi_receive(struct impl *impl, uint8_t *buffer, ssize_t len,
 		goto invalid_version;
 
 	hlen = 12 + hdr->cc * 4;
+	if (hdr->x) {
+		if (hlen + 4 >= len)
+			goto invalid_len;
+		hlen += 4 + ntohs(*(uint16_t *)(buffer + hlen + 2)) * 4;
+	}
 	if (hlen >= len)
 		goto invalid_len;
 
diff --git a/src/modules/module-rtp/opus.c b/src/modules/module-rtp/opus.c
index 19e1e55cb..d534e953f 100644
--- a/src/modules/module-rtp/opus.c
+++ b/src/modules/module-rtp/opus.c
@@ -119,6 +119,11 @@ static int rtp_opus_receive(struct impl *impl, uint8_t *buffer, ssize_t len,
 		goto invalid_version;
 
 	hlen = 12 + hdr->cc * 4;
+	if (hdr->x) {
+		if (hlen + 4 > len)
+			goto invalid_len;
+		hlen += 4 + ntohs(*(uint16_t *)(buffer + hlen + 2)) * 4;
+	}
 	if (hlen > len)
 		goto invalid_len;