diff --git a/Terminal.Gui/Drivers/AnsiDriver/AnsiOutput.cs b/Terminal.Gui/Drivers/AnsiDriver/AnsiOutput.cs
index d548c2c04c..7ea11a7b7d 100644
--- a/Terminal.Gui/Drivers/AnsiDriver/AnsiOutput.cs
+++ b/Terminal.Gui/Drivers/AnsiDriver/AnsiOutput.cs
@@ -39,7 +39,7 @@ public class AnsiOutput : OutputBase, IOutput
     // Tracks which underlying platform APIs are in use
     private readonly AnsiPlatform _platform;
 
-    private Size _consoleSize = new (80, 25);
+    private Size _consoleSize;
     private IOutputBuffer? _lastBuffer;
 
     private readonly WindowsVTOutputHelper? _windowsVTOutput;
@@ -71,7 +71,6 @@ public AnsiOutput (AppModel appModel = AppModel.FullScreen)
         _platform = AnsiPlatform.Degraded;
 
         _lastBuffer = new OutputBufferImpl ();
-        _lastBuffer.SetSize (80, 25);
         _currentCursor = new Cursor ();
 
         try
@@ -86,6 +85,9 @@ public AnsiOutput (AppModel appModel = AppModel.FullScreen)
             // Check if we have a real console first
             if (!IsAttachedToTerminal)
             {
+                _consoleSize = new Size (80, 25);
+                _lastBuffer.SetSize (_consoleSize.Width, _consoleSize.Height);
+
                 Trace.Lifecycle (nameof (AnsiOutput), "Init", "No real terminal attached. Running in degraded mode.");
 
                 return;