diff --git a/arch/x86/kvm/mmu/tdp_mmu.c b/arch/x86/kvm/mmu/tdp_mmu.c
index dc455e6e7dc7..b30e33dea265 100644
--- a/arch/x86/kvm/mmu/tdp_mmu.c
+++ b/arch/x86/kvm/mmu/tdp_mmu.c
@@ -609,7 +609,10 @@ static inline int __must_check __tdp_mmu_set_spte_atomic(struct kvm *kvm,
 	 */
 	WARN_ON_ONCE(iter->yielded || is_frozen_spte(iter->old_spte));
 
-	if (is_mirror_sptep(iter->sptep) && !is_frozen_spte(new_spte)) {
+	/* Should not set FROZEN_SPTE as a long-term value. */
+	KVM_MMU_WARN_ON(is_frozen_spte(new_spte));
+
+	if (is_mirror_sptep(iter->sptep)) {
 		int ret;
 
 		/*