diff --git a/modules/rtp_rtcp/source/rtp_sender_egress.cc b/modules/rtp_rtcp/source/rtp_sender_egress.cc
index 77803deda9..6d5477be21 100644
--- a/modules/rtp_rtcp/source/rtp_sender_egress.cc
+++ b/modules/rtp_rtcp/source/rtp_sender_egress.cc
@@ -206,7 +206,7 @@ void RtpSenderEgress::ProcessBitrateAndNotifyObservers() {
     return;
 
   rtc::CritScope lock(&lock_);
-  RtpSendRates send_rates = GetSendRates();
+  RtpSendRates send_rates = GetSendRatesLocked();
   bitrate_callback_->Notify(
       send_rates.Sum().bps(),
       send_rates[RtpPacketMediaType::kRetransmission].bps(), ssrc_);
@@ -214,6 +214,10 @@ void RtpSenderEgress::ProcessBitrateAndNotifyObservers() {
 
 RtpSendRates RtpSenderEgress::GetSendRates() const {
   rtc::CritScope lock(&lock_);
+  return GetSendRatesLocked();
+}
+
+RtpSendRates RtpSenderEgress::GetSendRatesLocked() const {
   const int64_t now_ms = clock_->TimeInMilliseconds();
   RtpSendRates current_rates;
   for (size_t i = 0; i < kNumMediaTypes; ++i) {
diff --git a/modules/rtp_rtcp/source/rtp_sender_egress.h b/modules/rtp_rtcp/source/rtp_sender_egress.h
index 298f57eff0..c9ecde3be8 100644
--- a/modules/rtp_rtcp/source/rtp_sender_egress.h
+++ b/modules/rtp_rtcp/source/rtp_sender_egress.h
@@ -51,20 +51,23 @@ class RtpSenderEgress {
                   RtpPacketHistory* packet_history);
   ~RtpSenderEgress() = default;
 
-  void SendPacket(RtpPacketToSend* packet, const PacedPacketInfo& pacing_info);
+  void SendPacket(RtpPacketToSend* packet, const PacedPacketInfo& pacing_info)
+      RTC_LOCKS_EXCLUDED(lock_);
   uint32_t Ssrc() const { return ssrc_; }
   absl::optional<uint32_t> RtxSsrc() const { return rtx_ssrc_; }
   absl::optional<uint32_t> FlexFecSsrc() const { return flexfec_ssrc_; }
 
-  void ProcessBitrateAndNotifyObservers();
-  RtpSendRates GetSendRates() const;
+  void ProcessBitrateAndNotifyObservers() RTC_LOCKS_EXCLUDED(lock_);
+  RtpSendRates GetSendRates() const RTC_LOCKS_EXCLUDED(lock_);
   void GetDataCounters(StreamDataCounters* rtp_stats,
-                       StreamDataCounters* rtx_stats) const;
+                       StreamDataCounters* rtx_stats) const
+      RTC_LOCKS_EXCLUDED(lock_);
 
-  void ForceIncludeSendPacketsInAllocation(bool part_of_allocation);
-  bool MediaHasBeenSent() const;
-  void SetMediaHasBeenSent(bool media_sent);
-  void SetTimestampOffset(uint32_t timestamp);
+  void ForceIncludeSendPacketsInAllocation(bool part_of_allocation)
+      RTC_LOCKS_EXCLUDED(lock_);
+  bool MediaHasBeenSent() const RTC_LOCKS_EXCLUDED(lock_);
+  void SetMediaHasBeenSent(bool media_sent) RTC_LOCKS_EXCLUDED(lock_);
+  void SetTimestampOffset(uint32_t timestamp) RTC_LOCKS_EXCLUDED(lock_);
 
   // For each sequence number in |sequence_number|, recall the last RTP packet
   // which bore it - its timestamp and whether it was the first and/or last
@@ -72,7 +75,8 @@ class RtpSenderEgress {
   // recalled, return a vector with all of them (in corresponding order).
   // If any could not be recalled, return an empty vector.
   std::vector<RtpSequenceNumberMap::Info> GetSentRtpPacketInfos(
-      rtc::ArrayView<const uint16_t> sequence_numbers) const;
+      rtc::ArrayView<const uint16_t> sequence_numbers) const
+      RTC_LOCKS_EXCLUDED(lock_);
 
  private:
   // Maps capture time in milliseconds to send-side delay in milliseconds.
@@ -80,6 +84,7 @@ class RtpSenderEgress {
   // time.
   typedef std::map<int64_t, int> SendDelayMap;
 
+  RtpSendRates GetSendRatesLocked() const RTC_EXCLUSIVE_LOCKS_REQUIRED(lock_);
   bool HasCorrectSsrc(const RtpPacketToSend& packet) const;
   void AddPacketToTransportFeedback(uint16_t packet_id,
                                     const RtpPacketToSend& packet,