diff --git a/addons/purchase_stock/models/purchase.py b/addons/purchase_stock/models/purchase.py
index 09b54dd6214..cb70a803a26 100644
--- a/addons/purchase_stock/models/purchase.py
+++ b/addons/purchase_stock/models/purchase.py
@@ -329,13 +329,14 @@ class PurchaseOrderLine(models.Model):
                             pass
                         elif (
                             move.location_dest_id.usage == "internal"
-                            and move.to_refund
+                            and move.location_id.usage != "supplier"
                             and move.location_dest_id
                             not in self.env["stock.location"].search(
                                 [("id", "child_of", move.warehouse_id.view_location_id.id)]
                             )
                         ):
-                            total -= move.product_uom._compute_quantity(move.product_uom_qty, line.product_uom, rounding_method='HALF-UP')
+                            if move.to_refund:
+                                total -= move.product_uom._compute_quantity(move.product_uom_qty, line.product_uom, rounding_method='HALF-UP')
                         else:
                             total += move.product_uom._compute_quantity(move.product_uom_qty, line.product_uom, rounding_method='HALF-UP')
                 line._track_qty_received(total)