diff --git a/libavfilter/buffersink.h b/libavfilter/buffersink.h
index 7298116c96..24cd2feac7 100644
--- a/libavfilter/buffersink.h
+++ b/libavfilter/buffersink.h
@@ -21,11 +21,18 @@
 
 /**
  * @file
+ * @ingroup lavfi_buffersink
  * memory buffer sink API for audio and video
  */
 
 #include "avfilter.h"
 
+/**
+ * @defgroup lavfi_buffersink Buffer sink API
+ * @ingroup lavfi
+ * @{
+ */
+
 #if FF_API_AVFILTERBUFFER
 /**
  * Get an audio/video buffer data from buffer_sink and put it in bufref.
@@ -190,4 +197,8 @@ int av_buffersink_get_frame(AVFilterContext *ctx, AVFrame *frame);
  */
 int av_buffersink_get_samples(AVFilterContext *ctx, AVFrame *frame, int nb_samples);
 
+/**
+ * @}
+ */
+
 #endif /* AVFILTER_BUFFERSINK_H */
diff --git a/libavfilter/buffersrc.h b/libavfilter/buffersrc.h
index be5d3a6384..5d124337b5 100644
--- a/libavfilter/buffersrc.h
+++ b/libavfilter/buffersrc.h
@@ -22,12 +22,19 @@
 
 /**
  * @file
+ * @ingroup lavfi_buffersrc
  * Memory buffer source API.
  */
 
 #include "libavcodec/avcodec.h"
 #include "avfilter.h"
 
+/**
+ * @defgroup lavfi_buffersrc Buffer source API
+ * @ingroup lavfi
+ * @{
+ */
+
 enum {
 
     /**
@@ -146,4 +153,8 @@ int av_buffersrc_add_frame_flags(AVFilterContext *buffer_src,
                                  AVFrame *frame, int flags);
 
 
+/**
+ * @}
+ */
+
 #endif /* AVFILTER_BUFFERSRC_H */