diff --git a/include/asm-i386/processor.h b/include/asm-i386/processor.h
index 0a4ec76..8c02b03 100644
--- a/include/asm-i386/processor.h
+++ b/include/asm-i386/processor.h
@@ -718,4 +718,10 @@
 #define mtrr_bp_init() do {} while (0)
 #endif
 
+#ifdef CONFIG_X86_MCE
+extern void mcheck_init(struct cpuinfo_x86 *c);
+#else
+#define mcheck_init(c) do {} while(0)
+#endif
+
 #endif /* __ASM_I386_PROCESSOR_H */