diff --git a/usr/lib/archboot/installer/bootloader.sh b/usr/lib/archboot/installer/bootloader.sh
index c91a76aeb..5e4f428ae 100644
--- a/usr/lib/archboot/installer/bootloader.sh
+++ b/usr/lib/archboot/installer/bootloader.sh
@@ -1206,7 +1206,7 @@ do_grub_uefi() {
         fi
         cp /${GRUB_PREFIX_DIR}/${GRUB_CFG} "${UEFISYS_MOUNTPOINT}"/EFI/BOOT/grub${_SPEC_UEFI_ARCH}.cfg
     fi
-    if [[ -e "${DESTDIR}/${UEFISYS_MOUNTPOINT}/EFI/grub/grub${_SPEC_UEFI_ARCH}.efi" && -z "${_DETECTED_UEFI_SECURE_BOOT}" && -e "${DESTDIR}/boot/grub/${_GRUB_ARCH}-efi/core.efi" ]]; then
+    if [[ -e "${DESTDIR}/${UEFISYS_MOUNTPOINT}/EFI/grub/grub${_SPEC_UEFI_ARCH}.efi" && "${_DETECTED_UEFI_SECURE_BOOT}" == "0" && -e "${DESTDIR}/boot/grub/${_GRUB_ARCH}-efi/core.efi" ]]; then
         _BOOTMGR_LABEL="GRUB"
         _BOOTMGR_LOADER_DIR="/EFI/grub/grub${_SPEC_UEFI_ARCH}.efi"
         do_uefi_bootmgr_setup