GUI.Button is always true?

A variable inside a GUI.Button if statement changes to true when I start my game without the button being pressed. I am sure that this is the button that is doing this because I have checked and anything inside it activates. I'll give you my script and any info would be appreciated!

 var texture : Texture;
 
 static var started = false;
 
 function OnGUI ()
 {
     if (!started)
     {
         if (GUI.Button (Rect (450, 300, 100, 100), texture));
         {            
             started = true;
         }
     }
 }
 
 function Update ()
 {
 
     print (started);
     if (started)
     {
         gameObject.Find ("Image").SetActive (false);
     }
 }

When the game starts up, started is true but then goes to false the next frame without me pressing the button. GUI.Button works fine in another script I made, it's really weird!