diff --git a/man2/statx.2 b/man2/statx.2
index 9e3aeaa36..c41ee45f9 100644
--- a/man2/statx.2
+++ b/man2/statx.2
@@ -77,6 +77,7 @@ struct statx {
        containing the filesystem where the file resides */
     __u32 stx_dev_major;   /* Major ID */
     __u32 stx_dev_minor;   /* Minor ID */
+    __u64 stx_mnt_id;      /* Mount ID */
 };
 .EE
 .in
@@ -258,6 +259,7 @@ STATX_SIZE	Want stx_size
 STATX_BLOCKS	Want stx_blocks
 STATX_BASIC_STATS	[All of the above]
 STATX_BTIME	Want stx_btime
+STATX_MNT_ID	Want stx_mnt_id (since Linux 5.8)
 STATX_ALL	[All currently available fields]
 .TE
 .in
@@ -411,6 +413,13 @@ The device on which this file (inode) resides.
 .IR stx_rdev_major " and "  stx_rdev_minor
 The device that this file (inode) represents if the file is of block or
 character device type.
+.TP
+.I stx_mnt_id
+.\" commit fa2fcf4f1df1559a0a4ee0f46915b496cc2ebf60
+The mount ID of the mount containing the file.  This is the same number reported by
+.BR name_to_handle_at (2)
+and corresponds to the number in the first field in one of the records in
+.IR /proc/self/mountinfo .
 .PP
 For further information on the above fields, see
 .BR inode (7).
@@ -573,9 +582,11 @@ is Linux-specific.
 .BR access (2),
 .BR chmod (2),
 .BR chown (2),
+.BR name_to_handle_at (2),
 .BR readlink (2),
 .BR stat (2),
 .BR utime (2),
+.BR proc (5),
 .BR capabilities (7),
 .BR inode (7),
 .BR symlink (7)