diff --git a/Pilz.UI.Telerik/Dialogs/RadFlyoutBase.cs b/Pilz.UI.Telerik/Dialogs/RadFlyoutBase.cs
index 673be9d..deaa5cd 100644
--- a/Pilz.UI.Telerik/Dialogs/RadFlyoutBase.cs
+++ b/Pilz.UI.Telerik/Dialogs/RadFlyoutBase.cs
@@ -60,6 +60,11 @@ public partial class RadFlyoutBase : UserControl
         InitializeComponent();
         ParentChanged += FlyoutDialogBase_ParentChanged;
 
+        // Change TabIndex to a very high value
+        // -> prevent conflicts with controls based on this class
+        radButton_Cancel.TabIndex = int.MaxValue - 1;
+        radButton_Cancel.TabIndex = int.MaxValue;
+
         // SVG Symbols
         radButton_Cancel.SvgImage = CancelSvg;
         radButton_Confirm.SvgImage = ConfirmSvg;
diff --git a/Pilz.UI/Dialogs/FlyoutBase.cs b/Pilz.UI/Dialogs/FlyoutBase.cs
index 08eecb6..486eb5d 100644
--- a/Pilz.UI/Dialogs/FlyoutBase.cs
+++ b/Pilz.UI/Dialogs/FlyoutBase.cs
@@ -43,10 +43,15 @@ public partial class FlyoutBase : UserControl
     public FlyoutBase()
     {
         InitializeComponent();
-        ParentChanged += FlyoutBase_ParentChanged; ;
+        ParentChanged += FlyoutBase_ParentChanged;
+
+        // Change TabIndex to a very high value
+        // -> prevent conflicts with controls based on this class
+        button_Cancel.TabIndex = int.MaxValue - 1;
+        button_Cancel.TabIndex = int.MaxValue;
     }
 
-    private void FlyoutBase_ParentChanged(object sender, System.EventArgs e)
+    private void FlyoutBase_ParentChanged(object? sender, EventArgs e)
     {
         var frm = FindForm();
         if (frm != null)