diff --git a/common b/common
index 1f778ac..2c65c30 100644
--- a/common
+++ b/common
@@ -76,7 +76,7 @@ api_fs_mount() {
   mount_conditionally "! mountpoint -q '$1'" "$1" "$1" --bind &&
   track_mount proc "$1/proc" -t proc -o nosuid,noexec,nodev &&
   track_mount sys "$1/sys" -t sysfs -o nosuid,noexec,nodev,ro &&
-  mount_conditionally "[[ -d $1/sys/firmware/efi/efivars ]]" \
+  mount_conditionally "[[ -d '$1/sys/firmware/efi/efivars' ]]" \
       efivarfs "$1/sys/firmware/efi/efivars" -t efivarfs -o nosuid,noexec,nodev &&
   track_mount udev "$1/dev" -t devtmpfs -o mode=0755,nosuid &&
   track_mount devpts "$1/dev/pts" -t devpts -o mode=0620,gid=5,nosuid,noexec &&