diff --git a/modules/audio_processing/audio_processing_impl.cc b/modules/audio_processing/audio_processing_impl.cc
index aac00d6e53..5e5c7f10e7 100644
--- a/modules/audio_processing/audio_processing_impl.cc
+++ b/modules/audio_processing/audio_processing_impl.cc
@@ -2025,7 +2025,7 @@ void AudioProcessingImpl::RecordProcessedCaptureStream(
   RTC_DCHECK(aec_dump_);
 
   aec_dump_->AddCaptureStreamOutput(data, config.num_channels(),
-                                    config.num_channels());
+                                    config.num_frames());
   aec_dump_->WriteCaptureStreamMessage();
 }