diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
index 23eead3..5d179c8 100644
--- a/drivers/iommu/intel-iommu.c
+++ b/drivers/iommu/intel-iommu.c
@@ -1144,7 +1144,7 @@ static void dma_pte_free_level(struct dmar_domain *domain, int level,
 		if (!dma_pte_present(pte) || dma_pte_superpage(pte))
 			goto next;
 
-		level_pfn = pfn & level_mask(level - 1);
+		level_pfn = pfn & level_mask(level);
 		level_pte = phys_to_virt(dma_pte_addr(pte));
 
 		if (level > 2)