diff --git a/product/ERP5/Document/Resource.py b/product/ERP5/Document/Resource.py
index d8355c3331511b996f84553681ebc6365f036f41..0ce460ead959a7a788737fd410b12df1f7901a23 100644
--- a/product/ERP5/Document/Resource.py
+++ b/product/ERP5/Document/Resource.py
@@ -721,8 +721,9 @@ class Resource(XMLMatrix, Variated):
         for surcharge_ratio in price_parameter_dict['surcharge_ratio']:
           sum_surcharge_ratio += surcharge_ratio
         unit_base_price = unit_base_price * sum_surcharge_ratio
-      # Divide by the priced quantity
-      if unit_base_price is not None:
+      # Divide by the priced quantity if not (None, 0)
+      if unit_base_price is not None\
+          and price_parameter_dict['priced_quantity']:
         priced_quantity = price_parameter_dict['priced_quantity']
         unit_base_price = unit_base_price / priced_quantity
       # Return result