diff --git a/UI/Config/IntegrationConfig.cs b/UI/Config/IntegrationConfig.cs
index 8de02ba6..dea486fd 100644
--- a/UI/Config/IntegrationConfig.cs
+++ b/UI/Config/IntegrationConfig.cs
@@ -25,6 +25,8 @@ namespace Mesen.Config
 		[Reactive] public bool ImportSaveRamLabels { get; set; } = true;
 		[Reactive] public bool ImportOtherLabels { get; set; } = true;
 		[Reactive] public bool ImportComments { get; set; } = true;
+		
+		[Reactive] public int TabSize { get; set; } = 4;
 
 		public bool IsMemoryTypeImportEnabled(MemoryType memType)
 		{
diff --git a/UI/Debugger/ViewModels/SourceViewViewModel.cs b/UI/Debugger/ViewModels/SourceViewViewModel.cs
index 0d86881c..4c36992a 100644
--- a/UI/Debugger/ViewModels/SourceViewViewModel.cs
+++ b/UI/Debugger/ViewModels/SourceViewViewModel.cs
@@ -155,12 +155,25 @@ public class SourceViewViewModel : DisposableViewModel, ISelectableModel
 			Address = lineAddr,
 			AbsoluteAddress = address ?? new AddressInfo() { Address = -1 },
 			Flags = LineFlags.VerifiedCode | (!showLineAddress ? LineFlags.Empty : LineFlags.None),
-			Text = file.Data[lineNumber],
+			Text = ReplaceTabs(file.Data[lineNumber], ConfigManager.Config.Debug.Integration.TabSize),
 			ByteCode = byteCode ?? Array.Empty<byte>(),
 			OpSize = (byte)opSize
 		};
 	}
 
+	private string ReplaceTabs(string line, int tabSize)
+	{
+		StringBuilder sb = new();
+		for(int i = 0; i < line.Length; i++) {
+			if(line[i] != '\t') {
+				sb.Append(line[i]);
+			} else {
+				sb.Append(' ', tabSize - sb.Length % tabSize);
+			}
+		}
+		return sb.ToString();
+	}
+
 	private void QuickSearch_OnFind(OnFindEventArgs e)
 	{
 		SourceFileInfo? file = SelectedFile;
diff --git a/UI/Debugger/Windows/DebuggerConfigWindow.axaml b/UI/Debugger/Windows/DebuggerConfigWindow.axaml
index 184edc4f..ce7aaee7 100644
--- a/UI/Debugger/Windows/DebuggerConfigWindow.axaml
+++ b/UI/Debugger/Windows/DebuggerConfigWindow.axaml
@@ -252,7 +252,12 @@
 							Margin="0 5 0 0"
 						/>
 					</c:OptionSection>
-
+					<c:OptionSection Header="{l:Translate lblSourceView}">
+						<StackPanel Orientation="Horizontal">
+							<TextBlock VerticalAlignment="Center" Text="{l:Translate lblTabSize}" />
+							<NumericUpDown Value="{Binding Integration.TabSize}" Minimum="1" Maximum="16" />
+						</StackPanel>
+					</c:OptionSection>
 				</StackPanel>
 			</TabItem>
 
diff --git a/UI/Localization/resources.en.xml b/UI/Localization/resources.en.xml
index c2bcb2ef..59ab840b 100644
--- a/UI/Localization/resources.en.xml
+++ b/UI/Localization/resources.en.xml
@@ -1524,7 +1524,10 @@
 			<Control ID="chkImportWorkRamLabels">Work RAM labels</Control>
 			<Control ID="chkImportOtherLabels">Other labels</Control>
 			<Control ID="chkImportComments">Import comments (restricted to the label types selected above)</Control>
-			
+
+			<Control ID="lblSourceView">Source view</Control>
+			<Control ID="lblTabSize">Tab size: </Control>
+
 			<Control ID="tabShortcuts">Shortcuts</Control>
 			<Control ID="tabShared">Shared</Control>
 			<Control ID="tabMemoryTools">Memory Viewer</Control>