diff --git a/board/radxa/rock5b/extlinux.conf b/board/radxa/rock5b/extlinux.conf
index 9832255992..c4198deaa0 100644
--- a/board/radxa/rock5b/extlinux.conf
+++ b/board/radxa/rock5b/extlinux.conf
@@ -1,4 +1,4 @@
 label Radxa Rock 5b Linux
   kernel /boot/Image
   devicetree /boot/rk3588-rock-5b.dtb
-  append root=/dev/mmcblk1p1 earlycon rootwait
+  append root=PARTLABEL=rootfs earlycon rootwait