diff --git a/stepmania/src/MenuInput.h b/stepmania/src/MenuInput.h
index 9d16a58b03..4fde8a1ff3 100644
--- a/stepmania/src/MenuInput.h
+++ b/stepmania/src/MenuInput.h
@@ -32,8 +32,8 @@ struct MenuInput
 	PlayerNumber	player;
 	MenuButton		button;
 
-	bool operator==( const MenuInput &other ) { return player == other.player && button == other.button; };
-	bool operator!=( const MenuInput &other ) { return !operator==(other); };
+	bool operator==( const MenuInput &other ) const { return player == other.player && button == other.button; };
+	bool operator!=( const MenuInput &other ) const { return !operator==(other); };
 
 	inline bool IsValid() const { return player != PLAYER_INVALID; };
 	inline void MakeInvalid() { player = PLAYER_INVALID; button = MenuButton_INVALID; };