WCF / ASMX :: Svcutil Generates Underscores In Enum With Type Int?

i am generating a wcf data contract from a schema, using svcutil /d: option, however the enum of type xsd:int in schema is generating all the values as ints, with underscores, obviously to make valid code. How can i get the actual value of 1000

E.g Enum Impact with values 1000,2000,3000 generates code

public enum Impact : int
{
[System.Runtime.Serialization.EnumMemberAttribute(Value = "1000")]
_1000 = 1,
[System.Runtime.Serialization.EnumMemberAttribute(Value = "2000")]
_2000 = 2,
[System.Runtime.Serialization.EnumMemberAttribute(Value = "3000")]
_3000 = 3
}