diff --git a/modules/video_coding/utility/quality_scaler.h b/modules/video_coding/utility/quality_scaler.h
index 1c2da94e86..ad998a295d 100644
--- a/modules/video_coding/utility/quality_scaler.h
+++ b/modules/video_coding/utility/quality_scaler.h
@@ -39,8 +39,8 @@ class AdaptationObserverInterface {
 };
 
 // QualityScaler runs asynchronously and monitors QP values of encoded frames.
-// It holds a reference to a ScalingObserverInterface implementation to signal
-// an intent to scale up or down.
+// It holds a reference to an AdaptationObserverInterface implementation to
+// signal an intent to scale up or down.
 class QualityScaler {
  public:
   // Construct a QualityScaler with a given |observer|.
diff --git a/video/video_stream_encoder.h b/video/video_stream_encoder.h
index f90a07d148..3cc46a371e 100644
--- a/video/video_stream_encoder.h
+++ b/video/video_stream_encoder.h
@@ -126,7 +126,7 @@ class VideoStreamEncoder : public rtc::VideoSinkInterface<VideoFrame>,
   // be called on |encoder_queue_|.
   rtc::TaskQueue* encoder_queue() { return &encoder_queue_; }
 
-  // webrtc::ScalingObserverInterface implementation.
+  // AdaptationObserverInterface implementation.
   // These methods are protected for easier testing.
   void AdaptUp(AdaptReason reason) override;
   void AdaptDown(AdaptReason reason) override;