diff --git a/share/man/man7/user-guide.7 b/share/man/man7/user-guide.7
index fcf4357c..484d9cbb 100644
--- a/share/man/man7/user-guide.7
+++ b/share/man/man7/user-guide.7
@@ -119,6 +119,9 @@ ext2 extensions.
 You can make a compatible filesystem with:
 .Pp
 .Dl $ mkfs.ext2 -O none,large_file,filetype
+.Pp
+You can mount ISO 9660 filesystems for e.g. CD-ROMs using
+.Xr iso9660fs 8 .
 .Ss Networking
 Internet Protocol version 4
 .Pq Xr ip 4
diff --git a/utils/command-not-found.c b/utils/command-not-found.c
index f0fda838..058148ce 100644
--- a/utils/command-not-found.c
+++ b/utils/command-not-found.c
@@ -80,6 +80,7 @@ struct command commands[] =
 	{LOGOUT, "logout", NULL, suggest_logout},
 
 	{MOUNT, "extfs", "system", NULL},
+	{MOUNT, "iso9660fs", "system", NULL},
 	{MOUNT, "mount", NULL, NULL},
 
 	{PAGER, "less", NULL, NULL},
diff --git a/utils/unmount.8 b/utils/unmount.8
index a3e6c5e9..48fb2579 100644
--- a/utils/unmount.8
+++ b/utils/unmount.8
@@ -33,4 +33,5 @@ It is not safe to shut down the computer directly after using this option.
 will exit 0 on success and non-zero otherwise.
 .Sh SEE ALSO
 .Xr unmount 2 ,
-.Xr extfs 8
+.Xr extfs 8 ,
+.Xr iso9660fs 8