diff --git a/[refs] b/[refs]
index f2042d5dc9b0..1b3639f15dd2 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 64b028b22616946a05bf9580f7f7f7ee2ac070b4
+refs/heads/master: 8ec6993d9f7d961014af970ded57542961fe9ad9
diff --git a/trunk/arch/x86/kernel/head_64.S b/trunk/arch/x86/kernel/head_64.S
index 26406601031c..17ba9ecf27c5 100644
--- a/trunk/arch/x86/kernel/head_64.S
+++ b/trunk/arch/x86/kernel/head_64.S
@@ -212,8 +212,8 @@ ENTRY(secondary_startup_64)
 	 */
 	lgdt	early_gdt_descr(%rip)
 
-	/* set up data segments. actually 0 would do too */
-	movl $__KERNEL_DS,%eax
+	/* set up data segments */
+	xorl %eax,%eax
 	movl %eax,%ds
 	movl %eax,%ss
 	movl %eax,%es