diff --git a/arch/x86/include/asm/vmx.h b/arch/x86/include/asm/vmx.h
index 3c9f455..056bda5 100644
--- a/arch/x86/include/asm/vmx.h
+++ b/arch/x86/include/asm/vmx.h
@@ -95,6 +95,8 @@
 
 #define VM_ENTRY_ALWAYSON_WITHOUT_TRUE_MSR	0x000011ff
 
+#define VMX_MISC_SAVE_EFER_LMA			0x00000020
+
 /* VMCS Encodings */
 enum vmcs_field {
 	VIRTUAL_PROCESSOR_ID            = 0x00000000,