diff --git a/include/vlc_aout.h b/include/vlc_aout.h
index 0c28029b8e..b5e97b23a2 100644
--- a/include/vlc_aout.h
+++ b/include/vlc_aout.h
@@ -236,9 +236,6 @@ struct audio_output
 
     void (*flush)( audio_output_t *);
     /**< Flushes the playback buffers (mandatory, cannot be NULL).
-      *
-      * \param wait true to wait for playback of pending buffers (drain),
-      *             false to discard pending buffers (flush)
       *
       * \note This callback cannot be called in stopped state.
       */