diff --git a/installer b/installer
index 6e98bcb..26f259c 100755
--- a/installer
+++ b/installer
@@ -2345,10 +2345,16 @@ prerun_grub()
 	if [[ $SYS == 'BIOS' && $LVM && -z $SEP_BOOT ]]; then
 		sed -i "s/GRUB_PRELOAD_MODULES=.*/GRUB_PRELOAD_MODULES=\"lvm\"/g" "$MNT/etc/default/grub"
 	fi
+
 	# setup for os-prober module
 	mkdir -p /run/{lvm,udev} "$MNT/hostrun/"{lvm,udev}
 	mount --bind /run/lvm "$MNT/hostrun/lvm"
 	mount --bind /run/udev "$MNT/hostrun/udev"
+	if grep -q "GRUB_DISABLE_OS_PROBER" "$MNT/etc/default/grub"; then
+		sed -i "s/.*GRUB_DISABLE_OS_PROBER=.*/GRUB_DISABLE_OS_PROBER=false/g" "$MNT/etc/default/grub"
+	else
+		echo "GRUB_DISABLE_OS_PROBER=false" >> "$MNT/etc/default/grub"
+	fi
 
 	return 0
 }