diff --git a/Source/Editor/Surface/Elements/Box.cs b/Source/Editor/Surface/Elements/Box.cs
index 2a460013c..6a8745fa6 100644
--- a/Source/Editor/Surface/Elements/Box.cs
+++ b/Source/Editor/Surface/Elements/Box.cs
@@ -578,6 +578,7 @@ namespace FlaxEditor.Surface.Elements
                             BreakConnection(connectedBox);
                             action.End();
                             Surface.Undo.AddAction(action);
+                            Surface.MarkAsEdited();
                         }
                         else
                         {