diff --git a/libavutil/channel_layout.c b/libavutil/channel_layout.c
index cd5cf426d4..f72b2cf00c 100644
--- a/libavutil/channel_layout.c
+++ b/libavutil/channel_layout.c
@@ -102,6 +102,7 @@ static const struct {
     { "7.1(wide)",   8,  AV_CH_LAYOUT_7POINT1_WIDE_BACK },
     { "7.1(wide-side)",   8,  AV_CH_LAYOUT_7POINT1_WIDE },
     { "octagonal",   8,  AV_CH_LAYOUT_OCTAGONAL },
+    { "hexadecagonal", 16, AV_CH_LAYOUT_HEXADECAGONAL },
     { "downmix",     2,  AV_CH_LAYOUT_STEREO_DOWNMIX, },
 };
 
diff --git a/libavutil/channel_layout.h b/libavutil/channel_layout.h
index dea4d6093d..ec7effead1 100644
--- a/libavutil/channel_layout.h
+++ b/libavutil/channel_layout.h
@@ -108,6 +108,7 @@
 #define AV_CH_LAYOUT_7POINT1_WIDE      (AV_CH_LAYOUT_5POINT1|AV_CH_FRONT_LEFT_OF_CENTER|AV_CH_FRONT_RIGHT_OF_CENTER)
 #define AV_CH_LAYOUT_7POINT1_WIDE_BACK (AV_CH_LAYOUT_5POINT1_BACK|AV_CH_FRONT_LEFT_OF_CENTER|AV_CH_FRONT_RIGHT_OF_CENTER)
 #define AV_CH_LAYOUT_OCTAGONAL         (AV_CH_LAYOUT_5POINT0|AV_CH_BACK_LEFT|AV_CH_BACK_CENTER|AV_CH_BACK_RIGHT)
+#define AV_CH_LAYOUT_HEXADECAGONAL     (AV_CH_LAYOUT_OCTAGONAL|AV_CH_WIDE_LEFT|AV_CH_WIDE_RIGHT|AV_CH_TOP_BACK_LEFT|AV_CH_TOP_BACK_RIGHT|AV_CH_TOP_BACK_CENTER|AV_CH_TOP_FRONT_CENTER|AV_CH_TOP_FRONT_LEFT|AV_CH_TOP_FRONT_RIGHT)
 #define AV_CH_LAYOUT_STEREO_DOWNMIX    (AV_CH_STEREO_LEFT|AV_CH_STEREO_RIGHT)
 
 enum AVMatrixEncoding {