diff --git a/[refs] b/[refs]
index a0ddfa24008d..ebe7b82cf571 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 229664bee6126e01f8662976a5fe2e79813b77c8
+refs/heads/master: dbe9e994c99ac9ac12d2b66ea42f44558f54fa52
diff --git a/trunk/arch/x86/xen/enlighten.c b/trunk/arch/x86/xen/enlighten.c
index 943684566ebe..8c5ff24a492b 100644
--- a/trunk/arch/x86/xen/enlighten.c
+++ b/trunk/arch/x86/xen/enlighten.c
@@ -155,6 +155,8 @@ static void xen_cpuid(unsigned int *ax, unsigned int *bx,
 	if (*ax == 1)
 		maskedx = ~((1 << X86_FEATURE_APIC) |  /* disable APIC */
 			    (1 << X86_FEATURE_ACPI) |  /* disable ACPI */
+			    (1 << X86_FEATURE_MCE)  |  /* disable MCE */
+			    (1 << X86_FEATURE_MCA)  |  /* disable MCA */
 			    (1 << X86_FEATURE_ACC));   /* thermal monitoring */
 
 	asm(XEN_EMULATE_PREFIX "cpuid"