Template Argument Deduction guide for unique_ptr argument type?

Is it possible to write a deduction guide so that an instance of Simple can be declared without template arguments? I've tried but cannot get the correct form to extract the unique_ptr element type.

//------------------------------------------------------------------------------
template< class T >
class Simple
{
public:
    Simple( std::unique_ptr< T >& u ) :
    u_( u )
    {}
private:
    std::unique_ptr< T >& u_;
};

class MyThing
{};

int main()
{
    std::unique_ptr< MyThing > upSimple;
    Simple( upSimple ); // error C2955: 'Simple': use of class template requires template argument list
}