diff --git a/product_warranty/__openerp__.py b/product_warranty/__openerp__.py
index 1e45d31e..03f092b0 100644
--- a/product_warranty/__openerp__.py
+++ b/product_warranty/__openerp__.py
@@ -36,10 +36,11 @@ Extend the product warranty management with warranty details on product / suppli
     'depends': ['product'],
     'init_xml': [],
     'update_xml': [
+        'security/ir.model.access.csv',
         'product_warranty_view.xml',
     ],
-    'demo_xml': [], 
-    'test': [], 
+    'demo_xml': [],
+    'test': [],
     'installable': True,
     'active': False,
     'certificate' : '',
diff --git a/product_warranty/security/ir.model.access.csv b/product_warranty/security/ir.model.access.csv
new file mode 100644
index 00000000..a90c8a7a
--- /dev/null
+++ b/product_warranty/security/ir.model.access.csv
@@ -0,0 +1,3 @@
+"id","name","model_id","group_id","perm_read","perm_write","perm_create","perm_unlink"
+"access_return_instruction_user","return.instruction.user","return.instruction","Sales / User","True","True","True",
+"access_return_instruction_manager","return.instruction.manager","return.instruction","Sales / Manager","True","True","True","True"