diff --git a/modules/audio_processing/include/audio_processing.h b/modules/audio_processing/include/audio_processing.h
index aba0a13924..6a0917a8f0 100644
--- a/modules/audio_processing/include/audio_processing.h
+++ b/modules/audio_processing/include/audio_processing.h
@@ -257,6 +257,8 @@ class AudioProcessing : public rtc::RefCountInterface {
       // Recommended not to use. Will be removed in the future.
       // APM components are not fine-tuned for legacy suppression levels.
       bool legacy_moderate_suppression_level = false;
+      // Recommended not to use. Will be removed in the future.
+      bool use_legacy_aec = false;
     } echo_canceller;
 
     // Enables background noise suppression.