diff --git a/rma_purchase/models/__init__.py b/rma_purchase/models/__init__.py
index a3a08e5e..5c53c7a9 100644
--- a/rma_purchase/models/__init__.py
+++ b/rma_purchase/models/__init__.py
@@ -1,5 +1,6 @@
 # -*- coding: utf-8 -*-
-# © 2017 Eficent Business and IT Consulting Services S.L.
 # License LGPL-3.0 or later (https://www.gnu.org/licenses/lgpl.html)
+
 from . import rma_order
 from . import rma_order_line
+from . import purchase_order_line
diff --git a/rma_purchase/models/purchase_order_line.py b/rma_purchase/models/purchase_order_line.py
new file mode 100644
index 00000000..03f593ed
--- /dev/null
+++ b/rma_purchase/models/purchase_order_line.py
@@ -0,0 +1,28 @@
+# -*- coding: utf-8 -*-
+# Copyright 2017 Eficent Business and IT Consulting Services S.L.
+# License LGPL-3.0 or later (https://www.gnu.org/licenses/lgpl.html)
+
+from openerp import api, fields, models
+
+
+class PurchaseOrderLine(models.Model):
+    _inherit = "purchase.order.line"
+
+    @api.model
+    def name_search(self, name='', args=None, operator='ilike', limit=100):
+        """Allows to search by PO reference."""
+        if not args:
+            args = []
+        args += ['|',
+                 (self._rec_name, operator, name),
+                 ('order_id.name', operator, name)]
+        return super(PurchaseOrderLine, self).name_search(
+            name=name, args=args, operator=operator, limit=limit)
+
+    @api.model
+    def _name_search(self, name='', args=None, operator='ilike',
+                     limit=100, name_get_uid=None):
+        """Typed text is cleared here for better extensibility."""
+        return super(PurchaseOrderLine, self)._name_search(
+            name='', args=args, operator=operator, limit=limit,
+            name_get_uid=name_get_uid)