Unmarshaller subclass created in wrong package

In the binding I declared a mapping with an unmarshaller:

<binding name="x">
...
<mapping name="test" class="com.x.impl.Test"
unmarshaller="com.x.impl.TestUnmarshaller"/>
...
</binding>

I would expect the subclass to be in the com.x.impl package and called something like: JiBX_xTestUnmarshaller_nn.class but the binding compiler generated it in the package com.x and it was called implJiBX_xTestUnmarshaller_nn.class (Looks like a '/' was missing somewhere in the compilation).