diff --git a/media/engine/webrtc_video_engine.cc b/media/engine/webrtc_video_engine.cc
index 72a0f039fa..01eacb3870 100644
--- a/media/engine/webrtc_video_engine.cc
+++ b/media/engine/webrtc_video_engine.cc
@@ -896,6 +896,9 @@ WebRtcVideoEngine::GetRtpHeaderExtensions() const {
         webrtc::RtpExtension::kRidUri, webrtc::RtpExtension::kRepairedRidUri}) {
     result.emplace_back(uri, id++, webrtc::RtpTransceiverDirection::kSendRecv);
   }
+  for (const auto& uri : {webrtc::RtpExtension::kAbsoluteCaptureTimeUri}) {
+    result.emplace_back(uri, id++, webrtc::RtpTransceiverDirection::kStopped);
+  }
   result.emplace_back(webrtc::RtpExtension::kGenericFrameDescriptorUri00, id++,
                       IsEnabled(trials_, "WebRTC-GenericDescriptorAdvertised")
                           ? webrtc::RtpTransceiverDirection::kSendRecv
diff --git a/media/engine/webrtc_voice_engine.cc b/media/engine/webrtc_voice_engine.cc
index fd3a679a45..1ee0c21993 100644
--- a/media/engine/webrtc_voice_engine.cc
+++ b/media/engine/webrtc_voice_engine.cc
@@ -37,6 +37,7 @@
 #include "api/media_types.h"
 #include "api/priority.h"
 #include "api/rtp_headers.h"
+#include "api/rtp_parameters.h"
 #include "api/rtp_transceiver_direction.h"
 #include "api/task_queue/pending_task_safety_flag.h"
 #include "api/transport/bitrate_settings.h"
@@ -684,6 +685,9 @@ WebRtcVoiceEngine::GetRtpHeaderExtensions() const {
                           webrtc::RtpExtension::kMidUri}) {
     result.emplace_back(uri, id++, webrtc::RtpTransceiverDirection::kSendRecv);
   }
+  for (const auto& uri : {webrtc::RtpExtension::kAbsoluteCaptureTimeUri}) {
+    result.emplace_back(uri, id++, webrtc::RtpTransceiverDirection::kStopped);
+  }
   return result;
 }