diff --git a/AirFighter/AirFighter/DrawingAirFighter.cs b/AirFighter/AirFighter/DrawingAirFighter.cs
index 94d1b4f..036fd29 100644
--- a/AirFighter/AirFighter/DrawingAirFighter.cs
+++ b/AirFighter/AirFighter/DrawingAirFighter.cs
@@ -29,10 +29,8 @@ namespace AirFighter
         {
             if (width < _airFighterWidth || height < _airFighterHeight) return;
 
-            if (_startPosX + _airFighterWidth > _pictureWidth) return;
-            if (_startPosX < 0) return;
-            if (_startPosY < 0) return;
-            if (_startPosY + _airFighterHeight > _pictureHeight) return;
+            if (x + _airFighterWidth > width || x < 0) return;
+            if (y + _airFighterHeight > height || y < 0) return;
 
             _startPosX = x;
             _startPosY = y;