diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c
index f82060e7..6645f2f 100644
--- a/drivers/iommu/amd_iommu.c
+++ b/drivers/iommu/amd_iommu.c
@@ -1975,7 +1975,7 @@ static void clear_dte_entry(u16 devid)
 {
 	/* remove entry from the device table seen by the hardware */
 	amd_iommu_dev_table[devid].data[0] = IOMMU_PTE_P | IOMMU_PTE_TV;
-	amd_iommu_dev_table[devid].data[1] = 0;
+	amd_iommu_dev_table[devid].data[1] &= (0x1ffUL << 32);
 
 	amd_iommu_apply_erratum_63(devid);
 }