diff --git a/arch/x86/kernel/cpu/amd.c b/arch/x86/kernel/cpu/amd.c
index a3a9e3cbdea..3c8090d1005 100644
--- a/arch/x86/kernel/cpu/amd.c
+++ b/arch/x86/kernel/cpu/amd.c
@@ -1,11 +1,19 @@
 #include <linux/init.h>
 #include <linux/bitops.h>
 #include <linux/mm.h>
+
 #include <asm/io.h>
 #include <asm/processor.h>
 #include <asm/apic.h>
 
+#ifdef CONFIG_X86_64
+# include <asm/numa_64.h>
+# include <asm/mmconfig.h>
+# include <asm/cacheflush.h>
+#endif
+
 #include <mach_apic.h>
+
 #include "cpu.h"
 
 /*
diff --git a/arch/x86/kernel/cpu/amd_64.c b/arch/x86/kernel/cpu/amd_64.c
index 20c3f12dfe7..1d83601e85e 100644
--- a/arch/x86/kernel/cpu/amd_64.c
+++ b/arch/x86/kernel/cpu/amd_64.c
@@ -1,9 +1,16 @@
 #include <linux/init.h>
+#include <linux/bitops.h>
 #include <linux/mm.h>
 
-#include <asm/numa_64.h>
-#include <asm/mmconfig.h>
-#include <asm/cacheflush.h>
+#include <asm/io.h>
+#include <asm/processor.h>
+#include <asm/apic.h>
+
+#ifdef CONFIG_X86_64
+# include <asm/numa_64.h>
+# include <asm/mmconfig.h>
+# include <asm/cacheflush.h>
+#endif
 
 #include <mach_apic.h>