diff --git a/core/busybox/build b/core/busybox/build
index f8e4bf74b..8577cc846 100755
--- a/core/busybox/build
+++ b/core/busybox/build
@@ -34,5 +34,9 @@ chmod u+s "$1/usr/bin/busybox-suid"
 # Install runit services.
 install -Dm755 crond.run           "$1/etc/sv/crond/run"
 install -Dm755 syslogd.run         "$1/etc/sv/syslogd/run"
+install -Dm755 mdev.run            "$1/etc/sv/mdev/run"
 ln -s /run/runit/supervise.crond   "$1/etc/sv/crond/supervise"
 ln -s /run/runit/supervise.syslogd "$1/etc/sv/syslogd/supervise"
+ln -s /run/runit/supervise.mdev    "$1/etc/sv/mdev/supervise"
+
+install -Dm644 mdev.conf "$1/etc/mdev.conf"
diff --git a/core/busybox/checksums b/core/busybox/checksums
index c4fa328a2..54a51d034 100644
--- a/core/busybox/checksums
+++ b/core/busybox/checksums
@@ -3,3 +3,5 @@ d0f940a72f648943c1f2211e0e3117387c31d765137d92bd8284a3fb9752a998  busybox-1.31.1
 da3ef90a65abcbd112fa98a00799745d88d568cde290e049a5380dfc74de620a  .config-suid
 814dea14ac612125e97dcc1d619219b2c9dfc14850bf48d858421fb2c98eca12  crond.run
 4a5981f4b0d791fe9b84b0b2e01ae905f6565c8245b3cd603e6decf34ddad71a  syslogd.run
+961f5944c3ed40a9407b42f19fe694adb95fe9684980fb16d1eee6d928c176b5  mdev.run
+032bb57fe6d623a976484195621396737c5990de89b39a7e085e0371b9f607de  mdev.conf
diff --git a/core/busybox/files/mdev.conf b/core/busybox/files/mdev.conf
new file mode 100644
index 000000000..6507047c3
--- /dev/null
+++ b/core/busybox/files/mdev.conf
@@ -0,0 +1,37 @@
+null        root:root 666 @chmod 666 $MDEV
+zero        root:root 666
+full        root:root 666
+
+random      root:root 444
+urandom     root:root 444
+kmem        root:root 640
+mem         root:root 640
+port        root:root 640
+
+console     root:tty  600 @chmod 600 $MDEV
+ptmx        root:tty  666
+pty.*       root:tty  660
+
+usbdev[0-9].[0-9]* root:root 660 !
+
+tty         root:tty  666
+tty[0-9]*   root:tty  660
+vcsa*[0-9]* root:tty  660
+ttyS[0-9]*  root:uucp 660
+
+SUBSYSTEM=input;.* root:input 660
+
+adsp        root:audio 660 >sound/
+audio       root:audio 660 >sound/
+dsp         root:audio 660 >sound/
+mixer       root:audio 660 >sound/
+sequencer.* root:audio 660 >sound/
+
+card[0-9]   root:video 660 =dri/
+
+agpgart     root:root  660 >misc/
+psaux       root:root  660 >misc/
+rtc         root:root  664 >misc/
+
+dri/.*      root:video 660
+
diff --git a/core/busybox/files/mdev.run b/core/busybox/files/mdev.run
new file mode 100644
index 000000000..8e37a5e4b
--- /dev/null
+++ b/core/busybox/files/mdev.run
@@ -0,0 +1,2 @@
+#!/bin/sh
+exec mdev -d
diff --git a/core/busybox/sources b/core/busybox/sources
index 289dcdb47..dbffa1186 100644
--- a/core/busybox/sources
+++ b/core/busybox/sources
@@ -3,3 +3,5 @@ files/.config
 files/.config-suid
 files/crond.run
 files/syslogd.run
+files/mdev.run
+files/mdev.conf
diff --git a/core/busybox/version b/core/busybox/version
index 65feea057..0e783297f 100644
--- a/core/busybox/version
+++ b/core/busybox/version
@@ -1 +1 @@
-1.31.1 2
+1.31.1 3