diff --git a/doc/APIchanges b/doc/APIchanges
index 9e93555dac..ca4f93b8b2 100644
--- a/doc/APIchanges
+++ b/doc/APIchanges
@@ -15,6 +15,9 @@ libavutil:     2017-10-21
 
 API changes, most recent first:
 
+2018-10-24 - xxxxxxxxxx - lavu 56.20.100 - frame.h
+  Add AV_FRAME_DATA_S12M_TIMECODE
+
 2018-10-11 - xxxxxxxxxx - lavc 58.33.100 - mediacodec.h
   Add av_mediacodec_render_buffer_at_time().