diff --git a/AntiAircraftGun/AntiAircraftGun/MapsCollection.cs b/AntiAircraftGun/AntiAircraftGun/MapsCollection.cs
index 7d61c5c..9fafc57 100644
--- a/AntiAircraftGun/AntiAircraftGun/MapsCollection.cs
+++ b/AntiAircraftGun/AntiAircraftGun/MapsCollection.cs
@@ -42,7 +42,7 @@ namespace AntiAircraftGun
         /// <param name="map">Карта</param>
         public void AddMap(string name, AbstractMap map)
         {
-            _mapStorages.Add(name, new MapWithSetAntiAircraftGunsGeneric<DrawingObjectAntiAircraftGun, AbstractMap>(_pictureWidth, _pictureHeight, map));
+            if(!_mapStorages.ContainsKey(name)) _mapStorages.Add(name, new MapWithSetAntiAircraftGunsGeneric<DrawingObjectAntiAircraftGun, AbstractMap>(_pictureWidth, _pictureHeight, map));
         }
         /// <summary>
         /// Удаление карты