diff --git a/Assets/IsoTools/Scripts/IsoWorld.cs b/Assets/IsoTools/Scripts/IsoWorld.cs
index 58f1945..5275d45 100644
--- a/Assets/IsoTools/Scripts/IsoWorld.cs
+++ b/Assets/IsoTools/Scripts/IsoWorld.cs
@@ -141,6 +141,8 @@ namespace IsoTools {
 
 		public void RemoveIsoObject(IsoObject iso_object) {
 			_objects.Remove(iso_object);
+			_visibles.Remove(iso_object);
+			_oldVisibles.Remove(iso_object);
 		}
 
 		// ------------------------------------------------------------------------