diff --git a/trytond/trytond/modules/sale/sale.py b/trytond/trytond/modules/sale/sale.py
index 3d66f74..b1096c2 100644
--- a/trytond/trytond/modules/sale/sale.py
+++ b/trytond/trytond/modules/sale/sale.py
@@ -1009,20 +1009,21 @@ class SaleLine(sequence_ordered(), ModelSQL, ModelView):
             'readonly': Eval('sale_state') != 'draft',
             },
         context={
+            'company': Eval('company', None),
+            },
+        search_context={
             'locations': If(Bool(Eval('_parent_sale', {}).get('warehouse')),
                 [Eval('_parent_sale', {}).get('warehouse', 0)], []),
             'stock_date_end': Eval('_parent_sale', {}).get('sale_date'),
             'stock_skip_warehouse': True,
-            # From _get_context_sale_price
-            'company': Eval(
-                '_parent_sale', {}).get('company', None),
             'currency': Eval('_parent_sale', {}).get('currency'),
             'customer': Eval('_parent_sale', {}).get('party'),
             'sale_date': Eval('_parent_sale', {}).get('sale_date'),
             'uom': Eval('unit'),
             'taxes': Eval('taxes', []),
             'quantity': Eval('quantity'),
-            }, depends=['type', 'sale_state'])
+            },
+        depends=['type', 'sale_state', 'company'])
     product_uom_category = fields.Function(
         fields.Many2One('product.uom.category', 'Product Uom Category'),
         'on_change_with_product_uom_category')
@@ -1080,6 +1081,9 @@ class SaleLine(sequence_ordered(), ModelSQL, ModelView):
         'on_change_with_shipping_date')
     sale_state = fields.Function(fields.Selection(STATES, 'Sale State'),
         'on_change_with_sale_state')
+    company = fields.Function(
+        fields.Many2One('company.company', "Company"),
+        'on_change_with_company')
 
     @classmethod
     def __register__(cls, module_name):
@@ -1143,7 +1147,7 @@ class SaleLine(sequence_ordered(), ModelSQL, ModelView):
 
     @fields.depends(
         'sale', '_parent_sale.currency', '_parent_sale.party',
-        '_parent_sale.sale_date', '_parent_sale.company',
+        '_parent_sale.sale_date', 'company',
         'unit', 'product', 'taxes')
     def _get_context_sale_price(self):
         context = {}
@@ -1153,8 +1157,8 @@ class SaleLine(sequence_ordered(), ModelSQL, ModelView):
             if self.sale.party:
                 context['customer'] = self.sale.party.id
             context['sale_date'] = self.sale.sale_date
-            if self.sale.company:
-                context['company'] = self.sale.company.id
+        if self.company:
+            context['company'] = self.company.id
         if self.unit:
             context['uom'] = self.unit.id
         elif self.product:
@@ -1308,6 +1312,11 @@ class SaleLine(sequence_ordered(), ModelSQL, ModelView):
         if self.sale:
             return self.sale.state
 
+    @fields.depends('sale', '_parent_sale.company')
+    def on_change_with_company(self, name=None):
+        if self.sale and self.sale.company:
+            return self.sale.company.id
+
     def get_invoice_line(self):
         'Return a list of invoice lines for sale line'
         pool = Pool()
diff --git a/trytond/trytond/modules/purchase/purchase.py b/trytond/trytond/modules/purchase/purchase.py
index 30ae987..a0459a5 100644
--- a/trytond/trytond/modules/purchase/purchase.py
+++ b/trytond/trytond/modules/purchase/purchase.py
@@ -967,6 +967,9 @@ class PurchaseLine(sequence_ordered(), ModelSQL, ModelView):
             'required': Bool(Eval('product_supplier')),
             },
         context={
+            'company': Eval('company', None),
+            },
+        search_context={
             'locations': If(Bool(Eval('_parent_purchase', {}).get(
                         'warehouse')),
                 [Eval('_parent_purchase', {}).get('warehouse', None)],
@@ -974,16 +977,13 @@ class PurchaseLine(sequence_ordered(), ModelSQL, ModelView):
             'stock_date_end': Eval('_parent_purchase', {}).get(
                 'purchase_date'),
             'stock_skip_warehouse': True,
-            # From _get_context_purchase_price
-            'company': Eval(
-                '_parent_purchase', {}).get('company', None),
             'currency': Eval('_parent_purchase', {}).get('currency'),
             'supplier': Eval('_parent_purchase', {}).get('party'),
             'purchase_date': Eval('_parent_purchase', {}).get('purchase_date'),
             'uom': Eval('unit'),
             'taxes': Eval('taxes', []),
             'quantity': Eval('quantity'),
-            }, depends=['type', 'purchase_state', 'product_supplier'])
+            }, depends=['type', 'purchase_state', 'product_supplier', 'company'])
     product_supplier = fields.Many2One(
         'purchase.product_supplier', "Supplier's Product",
         ondelete='RESTRICT',
@@ -1081,6 +1081,12 @@ class PurchaseLine(sequence_ordered(), ModelSQL, ModelView):
     purchase_state = fields.Function(
         fields.Selection(STATES, 'Purchase State'),
         'on_change_with_purchase_state')
+    company = fields.Function(
+        fields.Many2One('company.company', "Company"),
+        'on_change_with_company')
+    currency = fields.Function(
+        fields.Many2One('currency.currency', 'Currency'),
+        'on_change_with_currency')
 
     @classmethod
     def __register__(cls, module_name):
@@ -1144,7 +1150,7 @@ class PurchaseLine(sequence_ordered(), ModelSQL, ModelView):
 
     @fields.depends(
         'purchase', '_parent_purchase.currency', '_parent_purchase.party',
-        '_parent_purchase.purchase_date', '_parent_purchase.company',
+        '_parent_purchase.purchase_date', 'company',
         'unit', 'product', 'product_supplier', 'taxes')
     def _get_context_purchase_price(self):
         context = {}
@@ -1154,8 +1160,8 @@ class PurchaseLine(sequence_ordered(), ModelSQL, ModelView):
             if self.purchase.party:
                 context['supplier'] = self.purchase.party.id
             context['purchase_date'] = self.purchase.purchase_date
-            if self.purchase.company:
-                context['company'] = self.purchase.company.id
+            if self.company:
+                context['company'] = self.company.id
         if self.unit:
             context['uom'] = self.unit.id
         elif self.product:
@@ -1359,6 +1365,16 @@ class PurchaseLine(sequence_ordered(), ModelSQL, ModelView):
         if self.purchase:
             return self.purchase.state
 
+    @fields.depends('purchase', '_parent_purchase.company')
+    def on_change_with_company(self, name=None):
+        if self.purchase and self.purchase.company:
+            return self.purchase.company.id
+
+    @fields.depends('purchase', '_parent_purchase.currency')
+    def on_change_with_currency(self, name=None):
+        if self.purchase and self.purchase.currency:
+            return self.purchase.currency.id
+
     def get_invoice_line(self):
         'Return a list of invoice line for purchase line'
         pool = Pool()