Index: VirtualBox-5.1.2/src/VBox/Devices/PC/vbox.dsl
===================================================================
--- VirtualBox-5.1.2.orig/src/VBox/Devices/PC/vbox.dsl
+++ VirtualBox-5.1.2/src/VBox/Devices/PC/vbox.dsl
@@ -1179,7 +1179,7 @@ DefinitionBlock ("DSDT.aml", "DSDT", 1,
                 Device (SMC)
                 {
                     Name (_HID, EisaId ("APP0001"))
-                    Name (_CID, "smc-napa")
+                    Name (_CID, "smcnapa")
 
                     Method (_STA, 0, NotSerialized)
                     {