How to define a constructor in a struct?

[Minas Mina]

I want to make a struct that defines a constructor:

struct Point
{
        this()
        {
        }
}

However I get a compiler error:
"constructor main.Point.this default constructor for structs only 
allowed with @disable and no body"

I wrote a @disable next to it but same error. I don't understand 
what the "no body" part means.