diff --git a/libavformat/avformat.h b/libavformat/avformat.h
index b4b8075ae6..0446e1fdfa 100644
--- a/libavformat/avformat.h
+++ b/libavformat/avformat.h
@@ -879,6 +879,13 @@ typedef struct AVIndexEntry {
  */
 #define AV_DISPOSITION_TIMED_THUMBNAILS     (1 << 11)
 
+/**
+ * The stream is intended to be mixed with a spatial audio track. For example,
+ * it could be used for narration or stereo music, and may remain unchanged by
+ * listener head rotation.
+ */
+#define AV_DISPOSITION_NON_DIEGETIC         (1 << 12)
+
 /**
  * The subtitle stream contains captions, providing a transcription and possibly
  * a translation of audio. Typically intended for hearing-impaired audiences.
diff --git a/libavformat/dump.c b/libavformat/dump.c
index 69b838fbc7..e3f0056c20 100644
--- a/libavformat/dump.c
+++ b/libavformat/dump.c
@@ -618,6 +618,8 @@ static void dump_stream_format(const AVFormatContext *ic, int i,
         av_log(NULL, AV_LOG_INFO, " (dependent)");
     if (st->disposition & AV_DISPOSITION_STILL_IMAGE)
         av_log(NULL, AV_LOG_INFO, " (still image)");
+    if (st->disposition & AV_DISPOSITION_NON_DIEGETIC)
+        av_log(NULL, AV_LOG_INFO, " (non-diegetic)");
     av_log(NULL, AV_LOG_INFO, "\n");
 
     dump_metadata(NULL, st->metadata, "    ");