diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h
index b7d175e73a1b..6ebb2de3b120 100644
--- a/arch/arm64/include/asm/kvm_host.h
+++ b/arch/arm64/include/asm/kvm_host.h
@@ -222,7 +222,8 @@ struct kvm_arch {
 #define KVM_ARCH_FLAG_EL1_32BIT				4
 	/* PSCI SYSTEM_SUSPEND enabled for the guest */
 #define KVM_ARCH_FLAG_SYSTEM_SUSPEND_ENABLED		5
-
+	/* Guest has bought into the MMIO guard extension */
+#define KVM_ARCH_FLAG_MMIO_GUARD			6
 	unsigned long flags;
 
 	/*