How do I push to stack with unqiue_ptr without making a copy?

Originally I made a stack that took type of GameState*. So that'll be...

std::stack<GameState*> gameStates

However, someone informed me that if I wanted to retain ownership that I should use C++11's smart pointer unique_ptr. So that'll be...

std::stack<std::unique_ptr<GameState>> gameStates

Now whenever I push my GameState onto the stack, my compiler complains. I'm doing something wrong apparently, but its hard to decipher this error.

It says..

ReigalaSplash splashScreen1(game); //gameState object declaration
gameStates.push(std::move(&splashScreen1)); //move to stack without copying

The red line where the error appears is right over the . in gameStates.push(std::move(&splashScreen1))

How do I fix this ?