diff --git a/api/call/transport.h b/api/call/transport.h
index 292aa11da3..216251f368 100644
--- a/api/call/transport.h
+++ b/api/call/transport.h
@@ -15,8 +15,6 @@
 #include <stdint.h>
 
 #include "api/array_view.h"
-#include "api/ref_counted_base.h"
-#include "api/scoped_refptr.h"
 
 namespace webrtc {
 
@@ -30,9 +28,6 @@ struct PacketOptions {
   // A 16 bits positive id. Negative ids are invalid and should be interpreted
   // as packet_id not being set.
   int packet_id = -1;
-  // Additional data bound to the RTP packet for use in application code,
-  // outside of WebRTC.
-  rtc::scoped_refptr<rtc::RefCountedBase> additional_data;
   // Whether this is a retransmission of an earlier packet.
   bool is_retransmit = false;
   bool included_in_feedback = false;
diff --git a/modules/rtp_rtcp/source/deprecated/deprecated_rtp_sender_egress.cc b/modules/rtp_rtcp/source/deprecated/deprecated_rtp_sender_egress.cc
index 59ff9d70f1..6b259440d0 100644
--- a/modules/rtp_rtcp/source/deprecated/deprecated_rtp_sender_egress.cc
+++ b/modules/rtp_rtcp/source/deprecated/deprecated_rtp_sender_egress.cc
@@ -172,8 +172,6 @@ void DEPRECATED_RtpSenderEgress::SendPacket(
     AddPacketToTransportFeedback(*packet_id, *packet, pacing_info);
   }
 
-  options.additional_data = packet->additional_data();
-
   if (packet->packet_type() != RtpPacketMediaType::kPadding &&
       packet->packet_type() != RtpPacketMediaType::kRetransmission) {
     UpdateOnSendPacket(options.packet_id, packet->capture_time().ms(),
diff --git a/modules/rtp_rtcp/source/rtp_sender_egress.cc b/modules/rtp_rtcp/source/rtp_sender_egress.cc
index 7fcea096ec..7d7a30de2e 100644
--- a/modules/rtp_rtcp/source/rtp_sender_egress.cc
+++ b/modules/rtp_rtcp/source/rtp_sender_egress.cc
@@ -257,8 +257,6 @@ void RtpSenderEgress::CompleteSendPacket(const Packet& compound_packet,
     AddPacketToTransportFeedback(*packet_id, *packet, pacing_info);
   }
 
-  options.additional_data = packet->additional_data();
-
   if (packet->packet_type() != RtpPacketMediaType::kPadding &&
       packet->packet_type() != RtpPacketMediaType::kRetransmission &&
       send_packet_observer_ != nullptr && packet->capture_time().IsFinite()) {