diff --git a/arch/x86/kernel/apic/hw_nmi.c b/arch/x86/kernel/apic/hw_nmi.c
index 3b40082f03715fa13ecda71ab37a7fa76ee6b365..cefd6942f0e9198e260559c436f443e861ffb011 100644
--- a/arch/x86/kernel/apic/hw_nmi.c
+++ b/arch/x86/kernel/apic/hw_nmi.c
@@ -8,6 +8,7 @@
  *  Bits copied from original nmi.c file
  *
  */
+#include <asm/apic.h>
 
 #include <linux/cpumask.h>
 #include <linux/kdebug.h>