xjc: XML Validation issue

I am trying to generate java code using xjc.

My xsd is having following element

    <xs:element name="DataRate">                                        
        <xs:attribute name="Limit" type="xs:decimal" use="optional" />                                            
    </xs:element>

and xjc is complaining with

[ERROR] s4s-elt-must-match.1: The content of 'DataRate' must match (annotation?, (simpleType | complexType)?, (unique | key | keyref)*)). A problem was found starting at: attribute.

After little investigation, i got to know that the attribute element is not wrapped with complexType and hence xjc is complaining. If I modify the xsd as

      <xs:element name="DataRate">
         <xs:complexType>
             <xs:attribute name="Limit" type="xs:decimal" use="optional" />
         </xs:complexType>    
      </xs:element>

it is working fine. But, as the xsd I am getting from 3rd party, I want to avoid the modification.

Is there any other way to do that?