diff --git a/webrtc/video_engine/include/vie_codec.h b/webrtc/video_engine/include/vie_codec.h
index 023a36d06..f47043851 100644
--- a/webrtc/video_engine/include/vie_codec.h
+++ b/webrtc/video_engine/include/vie_codec.h
@@ -64,15 +64,13 @@ class WEBRTC_DLLEXPORT ViEDecoderObserver {
 
   // Called periodically with decoder timing information.  All values are
   // "current" snapshots unless decorated with a min_/max_ prefix.
-  // TODO(fischman): drop the do-nothing default impl. when
-  // WebRtcDecoderObserver is updated.
   virtual void DecoderTiming(int decode_ms,
                              int max_decode_ms,
                              int current_delay_ms,
                              int target_delay_ms,
                              int jitter_buffer_ms,
                              int min_playout_delay_ms,
-                             int render_delay_ms) {}
+                             int render_delay_ms) = 0;
 
   // This method is called when the decoder needs a new key frame from encoder
   // on the sender.