diff --git a/defaultenv/bin/boot b/defaultenv/bin/boot
index 42c7ec2..509b463 100644
--- a/defaultenv/bin/boot
+++ b/defaultenv/bin/boot
@@ -34,7 +34,10 @@
 	fi
 
 	if [ x$rootfs_type = xubifs ]; then
-		bootargs="$bootargs root=ubi0:root ubi.mtd=$rootfs_mtdblock"
+		if [ x$ubiroot = x ]; then
+			ubiroot = "root"
+		fi
+		bootargs="$bootargs root=ubi0:$ubiroot ubi.mtd=$rootfs_mtdblock"
 	else
 		bootargs="$bootargs root=/dev/mtdblock$rootfs_mtdblock"
 	fi