problem, LSP?

class Rectangle
{
public:
    Rectangle(int h_ = 0, int w_ = 0): height(h_), width(w_)
    {
    }
    void set_size(int h, int w)
    {
        do_set_size(h, w);
    }
protected:
    void do_set_size(int h, int w)
    {
        height = h;
        width = w;
    }
private:
    int height, width;
};

class Square: protected Rectangle
{
public:
    Square(int h_): Rectangle(h_, h_)
    {
    }
    void set_size(int h)
    {
        do_set_size(h, h);
    }
};