diff --git a/invoice.py b/invoice.py
index e743f2f960..c6afcec8be 100644
--- a/invoice.py
+++ b/invoice.py
@@ -113,8 +113,7 @@ class InvoiceLine(metaclass=PoolMeta):
         PurchaseLine = pool.get('purchase.line')
         name = super(InvoiceLine, self).origin_name
         if isinstance(self.origin, PurchaseLine):
-            name = (self.origin.purchase.reference
-                or self.origin.purchase.rec_name)
+            name = self.origin.purchase.rec_name
         return name
 
     @classmethod
diff --git a/stock.py b/stock.py
index feb9d05b11..8a669edce2 100644
--- a/stock.py
+++ b/stock.py
@@ -219,8 +219,7 @@ class Move(metaclass=PoolMeta):
         PurchaseLine = pool.get('purchase.line')
         name = super(Move, self).origin_name
         if isinstance(self.origin, PurchaseLine):
-            name = (self.origin.purchase.reference
-                or self.origin.purchase.rec_name)
+            name = self.origin.purchase.rec_name
         return name
 
     @classmethod