diff --git a/man2/statfs.2 b/man2/statfs.2
index 01539f754..1a055f980 100644
--- a/man2/statfs.2
+++ b/man2/statfs.2
@@ -75,7 +75,9 @@ The following filesystem types may appear in
 ADFS_SUPER_MAGIC      0xadf5
 AFFS_SUPER_MAGIC      0xadff
 AFS_SUPER_MAGIC       0x5346414f
-ANON_INODE_FS_MAGIC   0x09041934
+ANON_INODE_FS_MAGIC   0x09041934 /* Anonymous inode FS (for
+                                    pseudofiles that have no name;
+                                    e.g., epoll, signalfd, bpf) */
 AUTOFS_SUPER_MAGIC    0x0187
 BDEVFS_MAGIC          0x62646576
 BEFS_SUPER_MAGIC      0x42465331
@@ -84,8 +86,8 @@ BINFMTFS_MAGIC        0x42494e4d
 BPF_FS_MAGIC          0xcafe4a11
 BTRFS_SUPER_MAGIC     0x9123683e
 BTRFS_TEST_MAGIC      0x73727279
-CGROUP_SUPER_MAGIC    0x27e0eb
-CGROUP2_SUPER_MAGIC   0x63677270
+CGROUP_SUPER_MAGIC    0x27e0eb   /* Cgroup pseudo FS */
+CGROUP2_SUPER_MAGIC   0x63677270 /* Cgroup v2 pseudo FS */
 CIFS_MAGIC_NUMBER     0xff534d42
 CODA_SUPER_MAGIC      0x73757245
 COH_SUPER_MAGIC       0x012ff7b7
@@ -103,7 +105,7 @@ EXT3_SUPER_MAGIC      0xef53
 EXT4_SUPER_MAGIC      0xef53
 F2FS_SUPER_MAGIC      0xf2f52010
 FUSE_SUPER_MAGIC      0x65735546
-FUTEXFS_SUPER_MAGIC   0xbad1dea
+FUTEXFS_SUPER_MAGIC   0xbad1dea  /* Unused */
 HFS_SUPER_MAGIC       0x4244
 HOSTFS_SUPER_MAGIC    0x00c0ffee
 HPFS_SUPER_MAGIC      0xf995e849
@@ -111,12 +113,12 @@ HUGETLBFS_MAGIC       0x958458f6
 ISOFS_SUPER_MAGIC     0x9660
 JFFS2_SUPER_MAGIC     0x72b6
 JFS_SUPER_MAGIC       0x3153464a
-MINIX_SUPER_MAGIC     0x137f /* orig. minix */
-MINIX_SUPER_MAGIC2    0x138f /* 30 char minix */
-MINIX2_SUPER_MAGIC    0x2468 /* minix V2 */
-MINIX2_SUPER_MAGIC2   0x2478 /* minix V2, 30 char names */
-MINIX3_SUPER_MAGIC    0x4d5a /* minix V3 fs, 60 char names */
-MQUEUE_MAGIC          0x19800202
+MINIX_SUPER_MAGIC     0x137f     /* original minix FS */
+MINIX_SUPER_MAGIC2    0x138f     /* 30 char minix FS */
+MINIX2_SUPER_MAGIC    0x2468     /* minix V2 FS */
+MINIX2_SUPER_MAGIC2   0x2478     /* minix V2 FS, 30 char names */
+MINIX3_SUPER_MAGIC    0x4d5a     /* minix V3 FS, 60 char names */
+MQUEUE_MAGIC          0x19800202 /* POSIX messge queue FS */
 MSDOS_SUPER_MAGIC     0x4d44
 MTD_INODE_FS_MAGIC    0x11307854
 NCP_SUPER_MAGIC       0x564c
@@ -128,7 +130,7 @@ OCFS2_SUPER_MAGIC     0x7461636f
 OPENPROM_SUPER_MAGIC  0x9fa1
 OVERLAYFS_SUPER_MAGIC 0x794c7630
 PIPEFS_MAGIC          0x50495045
-PROC_SUPER_MAGIC      0x9fa0
+PROC_SUPER_MAGIC      0x9fa0     /* /proc FS */
 PSTOREFS_MAGIC        0x6165676c
 QNX4_SUPER_MAGIC      0x002f
 QNX6_SUPER_MAGIC      0x68191122