getDeclaredConstructor on an interface?

The javadoc for Class::getDeclaredConstructor (http://ift.tt/1TO818p) says:

Returns a Constructor object that reflects the specified constructor of the class or interface represented by this Class object. [emphasis mine]

Since you can't declare a constructor for an interface, what could it mean to return a "specified constructor" of an interface?

I tried it on Runnable.class and got NoSuchMethodException. Is there a case where getDeclaredConstructor will work on an interface? Or is this language in the javadoc just an error? Or does it mean something other than how I'm interpreting it?