diff --git a/Bulldozer/Bulldozer/Generics/BulldozersGenericStorage.cs b/Bulldozer/Bulldozer/Generics/BulldozersGenericStorage.cs
index 36f2155..79528c9 100644
--- a/Bulldozer/Bulldozer/Generics/BulldozersGenericStorage.cs
+++ b/Bulldozer/Bulldozer/Generics/BulldozersGenericStorage.cs
@@ -172,7 +172,7 @@ namespace Bulldozer.Generics
                         elem?.CreateDrawingBulldozer(_separatorForObject, _pictureWidth, _pictureHeight);
                         if (bulldozer != null)
                         {
-                            if (collection + bulldozer)
+                            if (!(collection + bulldozer))
                             {
                                 try
                                 {