diff --git a/doc/APIchanges b/doc/APIchanges
index 9bfe153099..48168f82e6 100644
--- a/doc/APIchanges
+++ b/doc/APIchanges
@@ -15,6 +15,9 @@ libavutil:     2017-10-21
 
 API changes, most recent first:
 
+2019-10-14 - f3746d31f9 - lavu 56.35.101 - opt.h
+  Add AV_OPT_FLAG_RUNTIME_PARAM.
+
 2019-09-25 - xxxxxxxxxx - lavc 58.59.100 - avcodec.h
   Add max_samples