diff --git a/modules/purchase_trade/pricing.py b/modules/purchase_trade/pricing.py
index b4563a7..2c6d853 100755
--- a/modules/purchase_trade/pricing.py
+++ b/modules/purchase_trade/pricing.py
@@ -283,7 +283,7 @@ class Component(ModelSQL, ModelView):
     ], "Price Source", required=True)
 
     fix_type = fields.Many2One('price.fixtype',"Fixation type")
-    ratio = fields.Numeric("%")
+    ratio = fields.Numeric("%",digits=(16,5))
     price_index = fields.Many2One('price.price',"Curve")
     price_matrix = fields.Many2One('price.matrix', "Price Matrix")
     currency = fields.Function(fields.Many2One('currency.currency',"Curr."),'get_cur')