diff --git a/doc/APIchanges b/doc/APIchanges
index f3df2767d4..63e973fe8c 100644
--- a/doc/APIchanges
+++ b/doc/APIchanges
@@ -12,6 +12,9 @@ libavutil:   2009-03-08
 
 API changes, most recent first:
 
+2009-12-13 - r20826 - lavc 52.42.0 - AVStream
+  add avg_frame_rate
+
 2009-12-12 - r20808 - lavu 50.6.0 - av_bmg_next()
   Introduce the av_bmg_next() function.
 
diff --git a/libavformat/avformat.h b/libavformat/avformat.h
index b67a1b4f6e..23e9d50008 100644
--- a/libavformat/avformat.h
+++ b/libavformat/avformat.h
@@ -22,7 +22,7 @@
 #define AVFORMAT_AVFORMAT_H
 
 #define LIBAVFORMAT_VERSION_MAJOR 52
-#define LIBAVFORMAT_VERSION_MINOR 41
+#define LIBAVFORMAT_VERSION_MINOR 42
 #define LIBAVFORMAT_VERSION_MICRO  0
 
 #define LIBAVFORMAT_VERSION_INT AV_VERSION_INT(LIBAVFORMAT_VERSION_MAJOR, \