diff --git a/arch/x86/include/asm/apic.h b/arch/x86/include/asm/apic.h
index d5f21089..d791ba46 100644
--- a/arch/x86/include/asm/apic.h
+++ b/arch/x86/include/asm/apic.h
@@ -33,6 +33,7 @@ extern "C" {
 #define APIC_TPR		0x0080	// Task Priority Regster
 #define APIC_EOI		0x00B0	// EOI Register
 #define APIC_SVR		0x00F0	// Spurious Interrupt Vector Register
+#define APIC_ESR		0x0280	// Error Status Regsiter
 #define APIC_ICR1		0x0300	// Interrupt Command Register [0-31]
 #define APIC_ICR2		0x0310	// Interrupt Command Register [32-63]
 #define APIC_LVT_T		0x0320	// LVT Timer Register