diff --git a/sys/sys/bus.h b/sys/sys/bus.h
--- a/sys/sys/bus.h
+++ b/sys/sys/bus.h
@@ -308,10 +308,10 @@
 
 #define	BUS_IVARS_PRIVATE	0x0	/* private variables */
 #define	BUS_IVARS_ACPI		0x100
-#define	BUS_IVARS_GIC		500
-#define	BUS_IVARS_GIC3		1000
-#define	BUS_IVARS_GPIOBUS	10500
-#define	BUS_IVARS_SUPERIO	10600
+#define	BUS_IVARS_GIC		0x200
+#define	BUS_IVARS_GIC3		0x300
+#define	BUS_IVARS_GPIOBUS	0x400
+#define	BUS_IVARS_SUPERIO	0x600
 
 /**
  * CPU sets supported by bus_get_cpus().  Note that not all sets may be