diff --git a/arch/x86/include/asm/svm.h b/arch/x86/include/asm/svm.h
index c936c9824405c6a917027949aa316486ce967bcd..0487ac0548704da1d0bbb6149aa25ffc0d0ce7d6 100644
--- a/arch/x86/include/asm/svm.h
+++ b/arch/x86/include/asm/svm.h
@@ -147,6 +147,7 @@ struct __attribute__ ((__packed__)) vmcb_control_area {
 #define SVM_VM_CR_SVM_DIS_MASK  0x0010ULL
 
 #define SVM_NESTED_CTL_NP_ENABLE	BIT(0)
+#define SVM_NESTED_CTL_SEV_ENABLE	BIT(1)
 
 struct __attribute__ ((__packed__)) vmcb_seg {
 	u16 selector;