diff --git a/arch/x86/kernel/head64.c b/arch/x86/kernel/head64.c
index d156bfbffa9afb808c81cdf4c706634c151af5d5..6643f3f994fb44f2d4a17c6bbcf9f32e310a0012 100644
--- a/arch/x86/kernel/head64.c
+++ b/arch/x86/kernel/head64.c
@@ -10,6 +10,7 @@
 #include <linux/kernel.h>
 #include <linux/string.h>
 #include <linux/percpu.h>
+#include <linux/start_kernel.h>
 
 #include <asm/processor.h>
 #include <asm/proto.h>
diff --git a/include/asm-x86/proto.h b/include/asm-x86/proto.h
index 4eddf2761804b85b8a8d2fde1f5616d84b58459e..5a45478b5d3ad7dd9ae005dd63250223ccf16ac5 100644
--- a/include/asm-x86/proto.h
+++ b/include/asm-x86/proto.h
@@ -8,8 +8,6 @@
 struct cpuinfo_x86; 
 struct pt_regs;
 
-extern void start_kernel(void);
-
 extern void early_idt_handler(void);
 
 extern void init_memory_mapping(unsigned long start, unsigned long end);