diff --git a/arch/x86/include/asm/mpspec_def.h b/arch/x86/include/asm/mpspec_def.h
index 79166b0..e3ace7d 100644
--- a/arch/x86/include/asm/mpspec_def.h
+++ b/arch/x86/include/asm/mpspec_def.h
@@ -1,5 +1,5 @@
-#ifndef ASM_X86__MPSPEC_DEF_H
-#define ASM_X86__MPSPEC_DEF_H
+#ifndef _ASM_X86_MPSPEC_DEF_H
+#define _ASM_X86_MPSPEC_DEF_H
 
 /*
  * Structure definitions for SMP machines following the
@@ -177,4 +177,4 @@
 	MP_BUS_PCI,
 	MP_BUS_MCA,
 };
-#endif /* ASM_X86__MPSPEC_DEF_H */
+#endif /* _ASM_X86_MPSPEC_DEF_H */