diff --git a/lcl/ldockctrl.pas b/lcl/ldockctrl.pas
index 21d731b360..4b9b3c77ea 100644
--- a/lcl/ldockctrl.pas
+++ b/lcl/ldockctrl.pas
@@ -667,6 +667,11 @@ begin
     Dlg.EnlargeBottomSpeedButton.Visible:=
                           Manager.Manager.EnlargeControl(Control,akBottom,true);
 
+    Dlg.EnlargeGroupBox.Visible := Dlg.EnlargeLeftSpeedButton.Visible or 
+                                   Dlg.EnlargeTopSpeedButton.Visible or
+                                   Dlg.EnlargeRightSpeedButton.Visible or
+                                   Dlg.EnlargeBottomSpeedButton.Visible;
+
     if Dlg.ShowModal=mrOk then begin
       // dock or undock
       case Dlg.DlgResult of