diff --git a/sys/dev/acpica/acpi.c b/sys/dev/acpica/acpi.c
--- a/sys/dev/acpica/acpi.c
+++ b/sys/dev/acpica/acpi.c
@@ -1533,7 +1533,7 @@
 	    }
 	}
     } else
-	res = BUS_ALLOC_RESOURCE(device_get_parent(bus), child, type, rid,
+	res = bus_generic_alloc_resource(bus, child, type, rid,
 	    start, end, count, flags);
 
     /*