diff --git a/init/resize-rootfs-if-needed.sh b/init/resize-rootfs-if-needed.sh
index 2a93f1e..b0c22a2 100755
--- a/init/resize-rootfs-if-needed.sh
+++ b/init/resize-rootfs-if-needed.sh
@@ -16,7 +16,7 @@ sysfs_xvda="/sys/class/block/xvda"
 # if root filesystem use already (almost) the whole dis
 non_rootfs_data=$(( 250 * 1024 * 2 ))
 rootfs_size=$(df --block-size=512 --output=size / | tail -n 1)
-if [ "$(cat "$sysfs_xvda/size")" -lt \
+if [ $(cat $sysfs_xvda/size) -lt \
        $(( non_rootfs_data + rootfs_size )) ]; then
    echo "root filesystem already at $rootfs_size blocks" >&2
    exit 0