diff --git a/drivers/pci/intel-iommu.c b/drivers/pci/intel-iommu.c
index 213a5c87fde..65aa1d427f4 100644
--- a/drivers/pci/intel-iommu.c
+++ b/drivers/pci/intel-iommu.c
@@ -1180,6 +1180,7 @@ static struct dmar_domain * iommu_alloc_domain(struct intel_iommu *iommu)
 	set_bit(num, iommu->domain_ids);
 	domain->id = num;
 	domain->iommu = iommu;
+	domain->flags = 0;
 	iommu->domains[num] = domain;
 	spin_unlock_irqrestore(&iommu->lock, flags);