diff --git a/modules/purchase_trade/purchase.py b/modules/purchase_trade/purchase.py
index 4f688a4..cfddb96 100755
--- a/modules/purchase_trade/purchase.py
+++ b/modules/purchase_trade/purchase.py
@@ -492,6 +492,7 @@ class Purchase(metaclass=PoolMeta):
                             Line.save([line])
 
 class PriceComposition(ModelSQL,ModelView):
+    "Price Composition"
     __name__ = 'price.composition'
 
     line = fields.Many2One('purchase.line',"Purchase line")