diff --git a/iso/syslinux/archiso_sys-linux.cfg b/iso/syslinux/archiso_sys-linux.cfg
index aa63aa1..89f47a1 100644
--- a/iso/syslinux/archiso_sys-linux.cfg
+++ b/iso/syslinux/archiso_sys-linux.cfg
@@ -29,3 +29,15 @@ MENU LABEL Parch Linux install medium (x86_64, BIOS, Copy to RAM)
 LINUX /%INSTALL_DIR%/boot/x86_64/vmlinuz-linux
 INITRD /%INSTALL_DIR%/boot/intel-ucode.img,/%INSTALL_DIR%/boot/amd-ucode.img,/%INSTALL_DIR%/boot/x86_64/initramfs-linux.img
 APPEND archisobasedir=%INSTALL_DIR% archisolabel=%ARCHISO_LABEL% copytoram
+
+
+#  compatibility boot option
+LABEL arch64compatibility
+TEXT HELP
+Boot the Parch Linux install medium on BIOS with compatibility mode.
+It allows you to install Parch Linux or perform system maintenance.
+ENDTEXT
+MENU LABEL Parch Linux install medium (x86_64, BIOS, compatibility)
+LINUX /%INSTALL_DIR%/boot/x86_64/vmlinuz-linux
+INITRD /%INSTALL_DIR%/boot/intel-ucode.img,/%INSTALL_DIR%/boot/amd-ucode.img,/%INSTALL_DIR%/boot/x86_64/initramfs-linux.img
+APPEND archisobasedir=%INSTALL_DIR% archisolabel=%ARCHISO_LABEL% nomodset