diff --git a/modules/congestion_controller/rtp/send_time_history.cc b/modules/congestion_controller/rtp/send_time_history.cc
index b0619a2595..d4a088ea13 100644
--- a/modules/congestion_controller/rtp/send_time_history.cc
+++ b/modules/congestion_controller/rtp/send_time_history.cc
@@ -38,7 +38,9 @@ void SendTimeHistory::AddAndRemoveOld(const PacketFeedback& packet) {
 
   // Add new.
   int64_t unwrapped_seq_num = seq_num_unwrapper_.Unwrap(packet.sequence_number);
-  history_.insert(std::make_pair(unwrapped_seq_num, packet));
+  PacketFeedback packet_copy = packet;
+  packet_copy.long_sequence_number = unwrapped_seq_num;
+  history_.insert(std::make_pair(unwrapped_seq_num, packet_copy));
 }
 
 bool SendTimeHistory::OnSentPacket(uint16_t sequence_number,
diff --git a/modules/rtp_rtcp/include/rtp_rtcp_defines.h b/modules/rtp_rtcp/include/rtp_rtcp_defines.h
index 28ee47b5b5..6df3def472 100644
--- a/modules/rtp_rtcp/include/rtp_rtcp_defines.h
+++ b/modules/rtp_rtcp/include/rtp_rtcp_defines.h
@@ -370,6 +370,9 @@ struct PacketFeedback {
   // Packet identifier, incremented with 1 for every packet generated by the
   // sender.
   uint16_t sequence_number;
+  // Session unique packet identifier, incremented with 1 for every packet
+  // generated by the sender.
+  int64_t long_sequence_number;
   // Size of the packet excluding RTP headers.
   size_t payload_size;
   // The network route ids that this packet is associated with.