diff --git a/ILSpy.Tests/Views/DebugStepsTests.cs b/ILSpy.Tests/Views/DebugStepsTests.cs
index cfd26b49b..0b1c4fc5a 100644
--- a/ILSpy.Tests/Views/DebugStepsTests.cs
+++ b/ILSpy.Tests/Views/DebugStepsTests.cs
@@ -133,6 +133,30 @@ public class DebugStepsTests
 		languageService.Languages.Should().Contain(l => l.Name == "Typed IL");
 		return Task.CompletedTask;
 	}
+	[AvaloniaTest]
+	public Task Pane_Reports_Not_Available_For_Languages_Without_Debug_Steps()
+	{
+		// The step tree only makes sense for IDebugStepProvider languages (C#, ILAst, Typed IL).
+		// For the plain IL disassembler the pane must not keep showing the previous language's
+		// stale step tree (whose commands would trigger pointless re-decompiles); it reports
+		// unavailability so the view swaps in a "not available" message instead.
+		var languageService = AppComposition.Current.GetExport<LanguageService>();
+		var debugStepsVm = AppComposition.Current.GetExport<DebugStepsPaneModel>();
+
+		languageService.CurrentLanguage = languageService.Languages.OfType<CSharpLanguage>().First();
+		global::Avalonia.Threading.Dispatcher.UIThread.RunJobs();
+		debugStepsVm.IsAvailable.Should().BeTrue("C# provides debug steps");
+
+		// Simulate a populated tree from the C# run, then flip to the disassembler language.
+		debugStepsVm.Steps = new[] { new ICSharpCode.Decompiler.IL.Transforms.Stepper.Node("stale") };
+		languageService.CurrentLanguage = languageService.Languages.OfType<ILLanguage>().First(l => l.Name == "IL");
+		global::Avalonia.Threading.Dispatcher.UIThread.RunJobs();
+
+		debugStepsVm.IsAvailable.Should().BeFalse("the IL disassembler provides no debug steps");
+		debugStepsVm.Steps.Should().BeNull("the previous language's step tree must not linger");
+		return Task.CompletedTask;
+	}
+
 	[AvaloniaTest]
 	public async Task Window_Menu_Toggle_Surfaces_The_Default_Hidden_Debug_Steps_Pane()
 	{
diff --git a/ILSpy/ViewModels/DebugStepsPaneModel.cs b/ILSpy/ViewModels/DebugStepsPaneModel.cs
index eb963f79a..9a70af238 100644
--- a/ILSpy/ViewModels/DebugStepsPaneModel.cs
+++ b/ILSpy/ViewModels/DebugStepsPaneModel.cs
@@ -92,6 +92,14 @@ namespace ILSpy.ViewModels
 		[ObservableProperty]
 		Stepper.Node? selectedStep;
 
+		/// <summary>
+		/// True while the current language is an <see cref="IDebugStepProvider"/>. When false,
+		/// the view replaces the step tree with a "not available" note instead of leaving the
+		/// previous language's stale tree (whose commands would trigger pointless re-decompiles).
+		/// </summary>
+		[ObservableProperty]
+		bool isAvailable;
+
 		public IRelayCommand ShowStateBeforeCommand { get; }
 		public IRelayCommand ShowStateAfterCommand { get; }
 		public IRelayCommand DebugStepCommand { get; }
@@ -162,6 +170,7 @@ namespace ILSpy.ViewModels
 				// Same language instance — just refresh the steps in case a decompile happened
 				// while we were detached.
 				Steps = activeLanguage!.Stepper.Steps;
+				IsAvailable = true;
 				return;
 			}
 			DetachFromLanguage();
@@ -169,10 +178,13 @@ namespace ILSpy.ViewModels
 			language.StepperUpdated += OnStepperUpdated;
 			Steps = language.Stepper.Steps;
 			Options = language.StepOptions;
+			IsAvailable = true;
 		}
 
 		void DetachFromLanguage()
 		{
+			IsAvailable = false;
+			Steps = null;
 			if (activeLanguage != null)
 			{
 				activeLanguage.StepperUpdated -= OnStepperUpdated;
diff --git a/ILSpy/Views/DebugSteps.axaml b/ILSpy/Views/DebugSteps.axaml
index fe6e7dbad..c5980b05d 100644
--- a/ILSpy/Views/DebugSteps.axaml
+++ b/ILSpy/Views/DebugSteps.axaml
@@ -7,7 +7,12 @@
              mc:Ignorable="d" d:DesignWidth="400" d:DesignHeight="300"
              x:Class="ILSpy.Views.DebugSteps"
              x:DataType="vm:DebugStepsPaneModel">
-	<DockPanel>
+	<Panel>
+	<TextBlock IsVisible="{Binding !IsAvailable}"
+	           HorizontalAlignment="Center" VerticalAlignment="Center"
+	           Margin="8" TextWrapping="Wrap" Opacity="0.7"
+	           Text="Debug steps are not available for the current language." />
+	<DockPanel IsVisible="{Binding IsAvailable}">
 		<!-- Options are contributed by the active step-provider language and selected by type:
 		     ILAst renders its writing-options checkboxes; C# (null Options) renders nothing. -->
 		<ContentControl DockPanel.Dock="Top" Margin="2" Content="{Binding Options}">
@@ -49,4 +54,5 @@
 			</TreeView.ContextMenu>
 		</TreeView>
 	</DockPanel>
+	</Panel>
 </UserControl>