diff --git a/modules/audio_coding/codecs/pcm16b/audio_decoder_pcm16b.cc b/modules/audio_coding/codecs/pcm16b/audio_decoder_pcm16b.cc
index 7761efe8b3..1e2b5db331 100644
--- a/modules/audio_coding/codecs/pcm16b/audio_decoder_pcm16b.cc
+++ b/modules/audio_coding/codecs/pcm16b/audio_decoder_pcm16b.cc
@@ -67,4 +67,9 @@ int AudioDecoderPcm16B::PacketDuration(const uint8_t* encoded,
   return static_cast<int>(encoded_len / (2 * Channels()));
 }
 
+int AudioDecoderPcm16B::PacketDurationRedundant(const uint8_t* encoded,
+                                                size_t encoded_len) const {
+  return PacketDuration(encoded, encoded_len);
+}
+
 }  // namespace webrtc
diff --git a/modules/audio_coding/codecs/pcm16b/audio_decoder_pcm16b.h b/modules/audio_coding/codecs/pcm16b/audio_decoder_pcm16b.h
index 6f50161d3f..c31cc5d0a2 100644
--- a/modules/audio_coding/codecs/pcm16b/audio_decoder_pcm16b.h
+++ b/modules/audio_coding/codecs/pcm16b/audio_decoder_pcm16b.h
@@ -32,6 +32,8 @@ class AudioDecoderPcm16B final : public AudioDecoder {
   std::vector<ParseResult> ParsePayload(rtc::Buffer&& payload,
                                         uint32_t timestamp) override;
   int PacketDuration(const uint8_t* encoded, size_t encoded_len) const override;
+  int PacketDurationRedundant(const uint8_t* encoded,
+                              size_t encoded_len) const override;
   int SampleRateHz() const override;
   size_t Channels() const override;