diff --git a/Pilz.UI.Telerik/Dialogs/RadFlyoutBase.cs b/Pilz.UI.Telerik/Dialogs/RadFlyoutBase.cs
index 7a9c721..0cfe454 100644
--- a/Pilz.UI.Telerik/Dialogs/RadFlyoutBase.cs
+++ b/Pilz.UI.Telerik/Dialogs/RadFlyoutBase.cs
@@ -235,7 +235,7 @@ public partial class RadFlyoutBase : UserControl
         if (FindForm() is not Form frm)
             return;
 
-        if (!AutoSize)
+        if (!AutoSize && !PreferredSize.IsEmpty)
             frm.ClientSize = PreferredSize;
     }