Index: sys/x86/include/apicvar.h
===================================================================
--- sys/x86/include/apicvar.h
+++ sys/x86/include/apicvar.h
@@ -78,7 +78,7 @@
 #define	MAX_APIC_ID		0x800
 #define	APIC_ID_ALL		0xffffffff
 
-#define	IOAPIC_MAX_ID		xAPIC_MAX_APIC_ID
+#define	IOAPIC_MAX_ID		0xff
 
 /* I/O Interrupts are used for external devices such as ISA, PCI, etc. */
 #define	APIC_IO_INTS	(IDT_IO_INTS + 16)