diff --git a/product_contract/models/__init__.py b/product_contract/models/__init__.py
index 388717d2..a275fa21 100644
--- a/product_contract/models/__init__.py
+++ b/product_contract/models/__init__.py
@@ -2,6 +2,7 @@
 # Copyright 2017 LasLabs Inc.
 # License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html).
 
+from . import contract_line
 from . import product_template
 from . import sale_order
 from . import sale_order_line
diff --git a/product_contract/models/contract_line.py b/product_contract/models/contract_line.py
new file mode 100644
index 00000000..998da169
--- /dev/null
+++ b/product_contract/models/contract_line.py
@@ -0,0 +1,16 @@
+# Copyright 2017 LasLabs Inc.
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
+
+
+from odoo import api, fields, models, _
+
+
+class AccountAnalyticInvoiceLine(models.Model):
+    _inherit = 'account.analytic.invoice.line'
+
+    sale_order_line_id = fields.Many2one(
+        comodel_name="sale.order.line",
+        string="Sale Order Line",
+        required=False,
+        copy=False,
+    )
diff --git a/product_contract/models/sale_order.py b/product_contract/models/sale_order.py
index 4b356f32..a2e8487d 100644
--- a/product_contract/models/sale_order.py
+++ b/product_contract/models/sale_order.py
@@ -64,7 +64,10 @@ class SaleOrder(models.Model):
         action = self.env.ref(
             "contract.action_account_analytic_sale_overdue_all"
         ).read()[0]
+        contracts = self.env['account.analytic.invoice.line'].search([
+            ('sale_order_line', 'in', self.order_line.ids)
+        ]).mapped('contract_id')
         action["domain"] = [
-            ("id", "in", self.order_line.mapped('contract_id').ids)
+            ("id", "in", contracts.ids)
         ]
         return action
diff --git a/product_contract/models/sale_order_line.py b/product_contract/models/sale_order_line.py
index b275e67e..1c13fdad 100644
--- a/product_contract/models/sale_order_line.py
+++ b/product_contract/models/sale_order_line.py
@@ -82,6 +82,7 @@ class SaleOrderLine(models.Model):
             'recurring_invoicing_type': self.recurring_invoicing_type,
             'recurring_rule_type': self.recurring_rule_type,
             'contract_id': contract.id,
+            'sale_order_line_id': self.id,
         }
 
     @api.multi