diff --git a/configs/czechlight_clearfog_defconfig b/configs/czechlight_clearfog_defconfig
index dcd39c3..fc1efd1 100644
--- a/configs/czechlight_clearfog_defconfig
+++ b/configs/czechlight_clearfog_defconfig
@@ -70,4 +70,8 @@
 CZECHLIGHT_CFG_FS_SIZE="256M"
 CZECHLIGHT_RAUC_ROOTFS=y
 CZECHLIGHT_RAUC_COMPATIBLE="czechlight-clearfog"
+CZECHLIGHT_RAUC_SLOT_A_ROOTFS_DEV="/dev/mmcblk0p1"
+CZECHLIGHT_RAUC_SLOT_A_CFG_DEV="/dev/mmcblk0p2"
+CZECHLIGHT_RAUC_SLOT_B_ROOTFS_DEV="/dev/mmcblk0p3"
+CZECHLIGHT_RAUC_SLOT_B_CFG_DEV="/dev/mmcblk0p4"
 CZECHLIGHT_NETCONF=y