diff --git a/arch/x86/include/asm/irq_vectors.h b/arch/x86/include/asm/irq_vectors.h
index 28477e4f2d49..1b35c4357ea8 100644
--- a/arch/x86/include/asm/irq_vectors.h
+++ b/arch/x86/include/asm/irq_vectors.h
@@ -25,6 +25,7 @@
  */
 
 #define NMI_VECTOR			0x02
+#define MCE_VECTOR			0x12
 
 /*
  * IDT vectors usable for external interrupt sources start