diff --git a/api/video_codecs/simulcast_stream.cc b/api/video_codecs/simulcast_stream.cc
index aa3486dc5d..312429ef9f 100644
--- a/api/video_codecs/simulcast_stream.cc
+++ b/api/video_codecs/simulcast_stream.cc
@@ -17,6 +17,11 @@ namespace webrtc {
 unsigned char SimulcastStream::GetNumberOfTemporalLayers() const {
   return numberOfTemporalLayers;
 }
+void SimulcastStream::SetNumberOfTemporalLayers(unsigned char n) {
+  RTC_DCHECK_GE(n, 1);
+  RTC_DCHECK_LE(n, 3);
+  numberOfTemporalLayers = n;
+}
 
 ScalabilityMode SimulcastStream::GetScalabilityMode() const {
   RTC_CHECK_GE(numberOfTemporalLayers, 1);
diff --git a/api/video_codecs/simulcast_stream.h b/api/video_codecs/simulcast_stream.h
index 8e55a9532d..7c0dd5d786 100644
--- a/api/video_codecs/simulcast_stream.h
+++ b/api/video_codecs/simulcast_stream.h
@@ -22,6 +22,7 @@ struct SimulcastStream {
   // setting to ScalabilityMode.
   unsigned char GetNumberOfTemporalLayers() const;
   ScalabilityMode GetScalabilityMode() const;
+  void SetNumberOfTemporalLayers(unsigned char n);
 
   int width = 0;
   int height = 0;