diff --git a/feeds/tip/certificates/files/etc/init.d/certificates b/feeds/tip/certificates/files/etc/init.d/certificates
index df9e751d3..d09d31de2 100755
--- a/feeds/tip/certificates/files/etc/init.d/certificates
+++ b/feeds/tip/certificates/files/etc/init.d/certificates
@@ -9,8 +9,8 @@ boot() {
 	local mtd=$(find_mtd_index certificates)
 	[ -n "$mtd" -a -f /sys/class/mtd/mtd$mtd/oobsize ] && ubiattach -p /dev/mtd$mtd
 	if [ -n "$(ubinfo -a | grep certificates)" ]; then
-		mount -t ubifs ubi0:certificates /certificates
-		mount -t ubifs ubi1:certificates /certificates
+		[ -e /dev/ubi0 ] && mount -t ubifs ubi0:certificates /certificates
+		[ -e /dev/ubi1 ] && mount -t ubifs ubi1:certificates /certificates
 	else
 		mount -t squashfs /dev/mtdblock$mtd /certificates
 	fi