diff --git a/mrp_bom_reference_selection/README.rst b/mrp_bom_reference_selection/README.rst
index bcabe5a10..2c106cbab 100644
--- a/mrp_bom_reference_selection/README.rst
+++ b/mrp_bom_reference_selection/README.rst
@@ -3,7 +3,7 @@ MRP Bill of Material Reference Selection
 
 This module allows to select the component in a bom when you have several bom for one product.
 This is used to manage versions of a product.
-Produced lot contain a reference to the bill of material used to compute the lot.
+Produced lot contains a reference to the bill of material used to compute the lot.
 
 Installation
 ============
diff --git a/mrp_bom_reference_selection/__init__.py b/mrp_bom_reference_selection/__init__.py
index fd3ec9075..0083786b3 100644
--- a/mrp_bom_reference_selection/__init__.py
+++ b/mrp_bom_reference_selection/__init__.py
@@ -26,6 +26,11 @@ from openerp import SUPERUSER_ID
 
 
 def set_bill_of_material_references(cr, registry):
+    """
+    This function adds a reference record to each existing boms when the
+    module is installed. This ensures that each bom has a reference
+    so that the module works properly.
+    """
     bom_obj = registry['mrp.bom']
     ref_obj = registry['mrp.bom.reference']
     bom_ids = bom_obj.search(cr, SUPERUSER_ID, [])