diff --git a/mrp_operations_extension/__openerp__.py b/mrp_operations_extension/__openerp__.py
index bbcb1d3ea..67c4d8ce7 100644
--- a/mrp_operations_extension/__openerp__.py
+++ b/mrp_operations_extension/__openerp__.py
@@ -40,12 +40,14 @@
     'website': "http://www.odoomrp.com",
     "depends": ['mrp_operations', 'mrp'],
     "category": "Manufacturing",
-    "data": ['views/mrp_workcenter_view.xml',
-             'views/mrp_routing_operation_view.xml',
-             'views/mrp_production_view.xml',
-             'views/mrp_bom_view.xml',
-             'views/mrp_workcenter_view.xml',
-             'views/mrp_routing_workcenter_view.xml',
-             ],
+    "data": [
+        'views/mrp_workcenter_view.xml',
+        'views/mrp_routing_operation_view.xml',
+        'views/mrp_production_view.xml',
+        'views/mrp_bom_view.xml',
+        'views/mrp_workcenter_view.xml',
+        'views/mrp_routing_workcenter_view.xml',
+        'security/ir.model.access.csv',
+    ],
     "installable": True
 }
diff --git a/mrp_operations_extension/models/mrp_routing_operation.py b/mrp_operations_extension/models/mrp_routing_operation.py
index a695989b7..7bc4027b7 100644
--- a/mrp_operations_extension/models/mrp_routing_operation.py
+++ b/mrp_operations_extension/models/mrp_routing_operation.py
@@ -19,7 +19,7 @@
 #
 ##############################################################################
 
-from openerp import models, fields, api, exceptions
+from openerp import models, fields, api
 
 
 class MrpOperationWorkcenter(models.Model):
diff --git a/mrp_operations_extension/security/ir.model.access.csv b/mrp_operations_extension/security/ir.model.access.csv
new file mode 100644
index 000000000..571fc4ee3
--- /dev/null
+++ b/mrp_operations_extension/security/ir.model.access.csv
@@ -0,0 +1,3 @@
+id,name,model_id:id,group_id:id,perm_read,perm_write,perm_create,perm_unlink
+access_mrp_operation_workcenter,access_mrp_operation_workcenter,model_mrp_operation_workcenter,mrp.group_mrp_user,1,1,1,1
+access_mrp_routing_operation,access_mrp_routing_operation,model_mrp_routing_operation,mrp.group_mrp_user,1,1,1,1
\ No newline at end of file