XSD Self Referencing issues

we're creating our own schema from an OData xml to make it more simpler and generic to be able to use by our partners. however, I stumble on this issue where its calling its own type (self referencing) and i cant figure out a way to go around this issue,.. here's the snippet, any thoughts?

<xsd:element name="User" type="userType"/>
<xsd:complexType name="userType">
    <xsd:all>
        <xsd:element name="customManagerList">
            <xsd:annotation>
                <xsd:documentation>Custom Manager</xsd:documentation>
            </xsd:annotation>
            <xsd:complexType>
                <xsd:sequence>
                    <xsd:element name="customManager" type="userType" maxOccurs="unbounded"/>
                </xsd:sequence>
            </xsd:complexType>
        </xsd:element>
    </xsd:all>
</xsd:complexType>