diff --git a/etc/mtree/BSD.root.dist b/etc/mtree/BSD.root.dist
index 7b8d9e7f806..af2f6a9add0 100644
--- a/etc/mtree/BSD.root.dist
+++ b/etc/mtree/BSD.root.dist
@@ -10,6 +10,8 @@
     boot
         defaults
         ..
+        dtb
+        ..
         firmware
         ..
         kernel
diff --git a/share/man/man7/hier.7 b/share/man/man7/hier.7
index ae1a2a1078d..9cba8961d16 100644
--- a/share/man/man7/hier.7
+++ b/share/man/man7/hier.7
@@ -48,13 +48,25 @@ programs and configuration files used during operating system bootstrap
 .It Pa defaults/
 default bootstrapping configuration files; see
 .Xr loader.conf 5
+.It Pa dtb/
+Compiled flattened device tree (FDT) files; see
+.Xr fdt 4 
+and
+.Xr dtc 1
+.It Pa firmware/
+Loadable modules containing binary firmware for hardware that needs
+firmware downloaded to it to function
 .It Pa kernel/
 pure kernel executable (the operating system loaded into memory
-at boot time).
+at boot time)
 .It Pa modules/
 third-party loadable kernel modules;
 see
 .Xr kldstat 8
+.It Pa zfs/
+Contains 
+.Xr zfs 8 
+zpool cache files.
 .El
 .It Pa /cdrom/
 default mount point for CD-ROM drives