byte and java.lang.Byte in WSDL problem

I have a simple Web Service with the following methods :

public byte getByteP() { return (byte) 0x89; }

public void setByteP(byte value) {
}

public Byte getByteW() { return new Byte((byte) 0x89); }

public void setByteW(Byte value) {
}

XFire generates the WSDL with the following types :
<xsd:element name="setByteP">
<xsd:complexType>
<xsd:sequence>
<xsd:element name="value" type="ns2:byte" minOccurs="1" maxOccurs="1" />
</xsd:sequence>
</xsd:complexType>
</xsd:element>
<xsd:element name="setByteW">
<xsd:complexType>
<xsd:sequence>
<xsd:element name="value" type="ns1:Byte" nillable="true" minOccurs="1" maxOccurs="1" />
</xsd:sequence>
</xsd:complexType>
</xsd:element>
<xsd:schema targetNamespace="http://lang.java" elementFormDefault="qualified" attributeFormDefault="qualified">
<xsd:complexType name="Byte">
<xsd:complexContent>
<xsd:extension base="Number" />
</xsd:complexContent>
</xsd:complexType>
<xsd:complexType name="Number" abstract="true" />
</xsd:schema>
<xsd:schema targetNamespace="http://DefaultNamespace" elementFormDefault="qualified" attributeFormDefault="qualified">
<xsd:complexType name="byte" abstract="true" />
</xsd:schema>

I expect that the type is xsd: byte instead of complex types

What do you think ?