diff --git a/src/arch/x86/lib/ioapic.c b/src/arch/x86/lib/ioapic.c
index 3f64209746..81d964cf94 100644
--- a/src/arch/x86/lib/ioapic.c
+++ b/src/arch/x86/lib/ioapic.c
@@ -79,7 +79,7 @@ void setup_ioapic(u32 ioapic_base, u8 ioapic_id)
 		printk(BIOS_DEBUG, "IOAPIC: ID = 0x%02x\n", ioapic_id);
 		/* Set IOAPIC ID if it has been specified. */
 		io_apic_write(ioapic_base, 0x00,
-			(io_apic_read(ioapic_base, 0x00) & 0xfff0ffff) |
+			(io_apic_read(ioapic_base, 0x00) & 0xf0ffffff) |
 			(ioapic_id << 24));
 	}