diff --git a/src/outputs/rtp_common.c b/src/outputs/rtp_common.c
index 08bda959..e5027ad2 100644
--- a/src/outputs/rtp_common.c
+++ b/src/outputs/rtp_common.c
@@ -136,6 +136,7 @@ rtp_packet_next(struct rtp_session *session, size_t payload_len, int samples, ch
     }
 
   pkt->samples     = samples;
+  pkt->header_len  = RTP_HEADER_LEN;
   pkt->payload_len = payload_len;
   pkt->data_len    = RTP_HEADER_LEN + payload_len;
   pkt->seqnum      = session->seqnum;
diff --git a/src/outputs/rtp_common.h b/src/outputs/rtp_common.h
index 23086a78..d6ced5c7 100644
--- a/src/outputs/rtp_common.h
+++ b/src/outputs/rtp_common.h
@@ -35,6 +35,7 @@ struct rtp_packet
   int samples;         // Number of samples in the packet
 
   uint8_t *header;     // Pointer to the RTP header
+  size_t header_len;   // Length of RTP header (12 bytes)
 
   uint8_t *payload;    // Pointer to the RTP payload
   size_t payload_size; // Size of allocated memory for RTP payload