diff --git a/webrtc/sdk/objc/Framework/Classes/RTCFieldTrials.mm b/webrtc/sdk/objc/Framework/Classes/RTCFieldTrials.mm
index 2c538cdb46..ac3a4b3e48 100644
--- a/webrtc/sdk/objc/Framework/Classes/RTCFieldTrials.mm
+++ b/webrtc/sdk/objc/Framework/Classes/RTCFieldTrials.mm
@@ -17,8 +17,9 @@
 #include "webrtc/system_wrappers/include/field_trial_default.h"
 
 static NSString * const kRTCEnableImprovedBitrateEstimateString =
-   @"WebRTC-ImprovedBitrateEstimate/Enabled/";
-
+    @"WebRTC-ImprovedBitrateEstimate/Enabled/";
+static NSString * const kRTCEnableAudioSendSideBweString =
+    @"WebRTC-Audio-SendSideBwe/Enabled/";
 static std::unique_ptr<char[]> gFieldTrialInitString;
 
 void RTCInitFieldTrials(RTCFieldTrialOptions options) {
@@ -26,6 +27,9 @@ void RTCInitFieldTrials(RTCFieldTrialOptions options) {
   if (options & RTCFieldTrialOptionsImprovedBitrateEstimate) {
     [fieldTrialInitString appendString:kRTCEnableImprovedBitrateEstimateString];
   }
+  if (options & RTCFieldTrialOptionsAudioSendSideBwe) {
+    [fieldTrialInitString appendString:kRTCEnableAudioSendSideBweString];
+  }
   size_t len = fieldTrialInitString.length + 1;
   gFieldTrialInitString.reset(new char[len]);
   if (![fieldTrialInitString getCString:gFieldTrialInitString.get()
diff --git a/webrtc/sdk/objc/Framework/Headers/WebRTC/RTCFieldTrials.h b/webrtc/sdk/objc/Framework/Headers/WebRTC/RTCFieldTrials.h
index 10f84b302a..c745ecf07e 100644
--- a/webrtc/sdk/objc/Framework/Headers/WebRTC/RTCFieldTrials.h
+++ b/webrtc/sdk/objc/Framework/Headers/WebRTC/RTCFieldTrials.h
@@ -15,6 +15,7 @@
 typedef NS_OPTIONS(NSUInteger, RTCFieldTrialOptions) {
   RTCFieldTrialOptionsNone = 0,
   RTCFieldTrialOptionsImprovedBitrateEstimate = 1 << 0,
+  RTCFieldTrialOptionsAudioSendSideBwe = 1 << 1,
 };
 
 /** Must be called before any other call into WebRTC. See: