diff --git a/libavfilter/af_dynaudnorm.c b/libavfilter/af_dynaudnorm.c
index 6f6541cc49..7c87ebce27 100644
--- a/libavfilter/af_dynaudnorm.c
+++ b/libavfilter/af_dynaudnorm.c
@@ -715,6 +715,7 @@ static int flush(AVFilterLink *outlink)
 
         s->pts = out->pts;
         ret = ff_filter_frame(outlink, out);
+        s->delay = s->queue.available;
     }
 
     return ret;