diff --git a/NotEnoughAV1Encodes/MainWindow.xaml.cs b/NotEnoughAV1Encodes/MainWindow.xaml.cs
index eed3b89..cd6df62 100644
--- a/NotEnoughAV1Encodes/MainWindow.xaml.cs
+++ b/NotEnoughAV1Encodes/MainWindow.xaml.cs
@@ -1214,7 +1214,7 @@ private void SliderEncoderPreset_ValueChanged(object sender, RoutedPropertyChang
 
         private void CheckBoxCustomVideoSettings_Toggled(object sender, RoutedEventArgs e)
         {
-            if (CheckBoxCustomVideoSettings.IsOn && presetLoadLock == false)
+            if (CheckBoxCustomVideoSettings.IsOn && presetLoadLock == false && IsLoaded)
             {
                 TextBoxCustomVideoSettings.Text = GenerateEncoderCommand();
             }