diff -u -r bbswitch-0.8/bbswitch.c bbswitch-0.8-5.18/bbswitch.c
--- bbswitch-0.8/bbswitch.c	2022-05-24 20:26:22.184553495 +0000
+++ bbswitch-0.8-5.18/bbswitch.c	2022-05-24 20:29:00.797008130 +0000
@@ -264,10 +264,15 @@
     pci_disable_device(dis_dev);
     do {
         struct acpi_device *ad = NULL;
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(5, 18, 0)
+        ad = acpi_fetch_acpi_dev(dis_handle);
+        if (!ad) {
+#else
         int r;
 
         r = acpi_bus_get_device(dis_handle, &ad);
         if (r || !ad) {
+#endif
             pr_warn("Cannot get ACPI device for PCI device\n");
             break;
         }