diff --git a/doc/APIchanges b/doc/APIchanges
index 57187692ff..1151a51356 100644
--- a/doc/APIchanges
+++ b/doc/APIchanges
@@ -8,6 +8,7 @@ libavfilter:   2011-04-18
 libavformat:   2012-01-27
 libavresample: 2012-04-24
 libpostproc:   2011-04-18
+libswresample: 2011-09-19
 libswscale:    2011-06-20
 libavutil:     2011-04-18