diff --git a/doc/APIchanges b/doc/APIchanges
index fb15411e6c..013e870b67 100644
--- a/doc/APIchanges
+++ b/doc/APIchanges
@@ -14,6 +14,12 @@ libavutil:     2015-08-28
 
 
 API changes, most recent first:
+
+2015-12-22 - xxxxxxx - lavfi 6.21.101 - avfilter.h
+  Deprecate avfilter_link_set_closed().
+  Applications are not supposed to mess with links,
+  they should close the sinks.
+
 2015-12-17 - lavc 57.18.100 / 57.11.0 - avcodec.h dirac.h
   xxxxxxx - Add av_packet_add_side_data().
   xxxxxxx - Add AVCodecContext.coded_side_data.
diff --git a/libavfilter/avfilter.h b/libavfilter/avfilter.h
index f2a934eda0..5022036faf 100644
--- a/libavfilter/avfilter.h
+++ b/libavfilter/avfilter.h
@@ -546,7 +546,10 @@ int avfilter_link_get_channels(AVFilterLink *link);
 
 /**
  * Set the closed field of a link.
+ * @deprecated applications are not supposed to mess with links, they should
+ * close the sinks.
  */
+attribute_deprecated
 void avfilter_link_set_closed(AVFilterLink *link, int closed);
 
 /**
diff --git a/libavfilter/version.h b/libavfilter/version.h
index a7832e05ff..79a1f01514 100644
--- a/libavfilter/version.h
+++ b/libavfilter/version.h
@@ -31,7 +31,7 @@
 
 #define LIBAVFILTER_VERSION_MAJOR   6
 #define LIBAVFILTER_VERSION_MINOR  21
-#define LIBAVFILTER_VERSION_MICRO 100
+#define LIBAVFILTER_VERSION_MICRO 101
 
 #define LIBAVFILTER_VERSION_INT AV_VERSION_INT(LIBAVFILTER_VERSION_MAJOR, \
                                                LIBAVFILTER_VERSION_MINOR, \