diff --git a/src/disassemblysettingspage.ui b/src/disassemblysettingspage.ui
index b1f2471b..69221f36 100644
--- a/src/disassemblysettingspage.ui
+++ b/src/disassemblysettingspage.ui
@@ -32,14 +32,14 @@
    <property name="bottomMargin">
     <number>0</number>
    </property>
-   <item row="2" column="0">
+   <item row="6" column="0">
     <widget class="QLabel" name="label">
      <property name="text">
       <string>Source Code Search Paths:</string>
      </property>
     </widget>
    </item>
-   <item row="2" column="1">
+   <item row="6" column="1">
     <widget class="KEditListWidget" name="sourcePaths">
      <property name="buttons">
       <set>KEditListWidget::All</set>
@@ -60,20 +60,30 @@
      </property>
     </widget>
    </item>
-   <item row="1" column="0">
+   <item row="2" column="0">
     <widget class="QLabel" name="label_3">
      <property name="text">
       <string>Show hexdump:</string>
      </property>
     </widget>
    </item>
-   <item row="1" column="1">
+   <item row="2" column="1">
     <widget class="QCheckBox" name="showHexdump">
      <property name="text">
       <string/>
      </property>
     </widget>
    </item>
+   <item row="3" column="0">
+    <widget class="QLabel" name="label_4">
+     <property name="text">
+      <string>Tab width</string>
+     </property>
+    </widget>
+   </item>
+   <item row="3" column="1">
+    <widget class="QSpinBox" name="tabWidth"/>
+   </item>
   </layout>
  </widget>
  <customwidgets>
diff --git a/src/models/disassemblymodel.cpp b/src/models/disassemblymodel.cpp
index 5daec8d4..3046a55f 100644
--- a/src/models/disassemblymodel.cpp
+++ b/src/models/disassemblymodel.cpp
@@ -11,9 +11,9 @@
 #include "search.h"
 #include "sourcecodemodel.h"
 
-DisassemblyModel::DisassemblyModel(KSyntaxHighlighting::Repository* repository, QObject* parent)
+DisassemblyModel::DisassemblyModel(KSyntaxHighlighting::Repository* repository, int tabWidth, QObject* parent)
     : QAbstractTableModel(parent)
-    , m_highlightedText(repository)
+    , m_highlightedText(repository, tabWidth)
 {
 }
 
diff --git a/src/models/disassemblymodel.h b/src/models/disassemblymodel.h
index 7c65a546..faf2c880 100644
--- a/src/models/disassemblymodel.h
+++ b/src/models/disassemblymodel.h
@@ -27,7 +27,7 @@ class DisassemblyModel : public QAbstractTableModel
 {
     Q_OBJECT
 public:
-    explicit DisassemblyModel(KSyntaxHighlighting::Repository* repository, QObject* parent = nullptr);
+    explicit DisassemblyModel(KSyntaxHighlighting::Repository* repository, int tabWidth = 8, QObject* parent = nullptr);
     ~DisassemblyModel() override;
 
     void setDisassembly(const DisassemblyOutput& disassemblyOutput, const Data::CallerCalleeResults& results);
diff --git a/src/models/highlightedtext.cpp b/src/models/highlightedtext.cpp
index 2ce792ed..b656dd4b 100644
--- a/src/models/highlightedtext.cpp
+++ b/src/models/highlightedtext.cpp
@@ -7,6 +7,7 @@
 
 #include "highlightedtext.h"
 
+#include <QFontMetrics>
 #include <QGuiApplication>
 #include <QPalette>
 #include <QTextLayout>
@@ -15,6 +16,8 @@
 
 #include <KColorScheme>
 
+#include <hotspot-config.h>
+
 #if KFSyntaxHighlighting_FOUND
 #include <KSyntaxHighlighting/AbstractHighlighter>
 #include <KSyntaxHighlighting/Definition>
@@ -229,10 +232,11 @@ class HighlightedLine
 {
 public:
     HighlightedLine() = default;
-    HighlightedLine(HighlightingImplementation* highlighter, const QString& text, int index)
+    HighlightedLine(HighlightingImplementation* highlighter, const QString& text, int index, int tabWidth)
         : m_highlighter(highlighter)
         , m_text(Util::removeAnsi(text))
         , m_index(index)
+        , m_tabWidth(tabWidth)
         , m_layout(nullptr)
     {
     }
@@ -250,13 +254,25 @@ class HighlightedLine
         m_layout = nullptr;
     }
 
+    void setTabWidth(int tabWidth)
+    {
+        m_tabWidth = tabWidth;
+        m_layout = nullptr;
+    }
+
 private:
     std::unique_ptr<QTextLayout> buildLayout() const
     {
         Q_ASSERT(m_index != -1);
         auto layout = std::make_unique<QTextLayout>();
 
-        layout->setFont(QFontDatabase::systemFont(QFontDatabase::FixedFont));
+        auto font = QFontDatabase::systemFont(QFontDatabase::FixedFont);
+
+        auto option = layout->textOption();
+        option.setTabStopDistance(m_tabWidth * QFontMetrics(font).horizontalAdvance(QLatin1Char(' ')));
+        layout->setTextOption(option);
+
+        layout->setFont(font);
         layout->setText(m_text);
         layout->setFormats(m_highlighter->format(m_index));
 
@@ -276,16 +292,17 @@ class HighlightedLine
     HighlightingImplementation* m_highlighter = nullptr;
     QString m_text;
     int m_index = -1;
+    int m_tabWidth = 8;
     mutable std::unique_ptr<QTextLayout> m_layout;
 };
 static_assert(std::is_nothrow_move_constructible_v<HighlightedLine>);
 static_assert(std::is_nothrow_destructible_v<HighlightedLine>);
 
-HighlightedText::HighlightedText(KSyntaxHighlighting::Repository* repository, QObject* parent)
+HighlightedText::HighlightedText(KSyntaxHighlighting::Repository* repository, int tabWidth, QObject* parent)
     : QObject(parent)
     , m_repository(repository)
+    , m_tabWidth(tabWidth)
 {
-    Q_UNUSED(repository);
 }
 
 HighlightedText::~HighlightedText() = default;
@@ -310,7 +327,7 @@ void HighlightedText::setText(const QStringList& text)
     m_highlighter->formatText(text);
     int index = 0;
     std::transform(text.cbegin(), text.cend(), m_highlightedLines.begin(), [this, &index](const QString& text) {
-        return HighlightedLine {m_highlighter.get(), text, index++};
+        return HighlightedLine {m_highlighter.get(), text, index++, m_tabWidth};
     });
 
     m_cleanedLines = text;
@@ -358,3 +375,9 @@ void HighlightedText::updateHighlighting()
     std::for_each(m_highlightedLines.begin(), m_highlightedLines.end(),
                   [](HighlightedLine& line) { line.updateHighlighting(); });
 }
+
+void HighlightedText::updateTabWidth(int tabWidth)
+{
+    std::for_each(m_highlightedLines.begin(), m_highlightedLines.end(),
+                  [tabWidth](HighlightedLine& line) { line.setTabWidth(tabWidth); });
+}
diff --git a/src/models/highlightedtext.h b/src/models/highlightedtext.h
index 0c79f763..400419ca 100644
--- a/src/models/highlightedtext.h
+++ b/src/models/highlightedtext.h
@@ -14,8 +14,6 @@
 class QTextLayout;
 class QTextLine;
 
-#include "hotspot-config.h"
-
 namespace KSyntaxHighlighting {
 class SyntaxHighlighter;
 class Definition;
@@ -29,7 +27,7 @@ class HighlightedText : public QObject
 {
     Q_OBJECT
 public:
-    HighlightedText(KSyntaxHighlighting::Repository* repository, QObject* parent = nullptr);
+    HighlightedText(KSyntaxHighlighting::Repository* repository, int tabWidth, QObject* parent = nullptr);
     ~HighlightedText() override;
 
     void setText(const QStringList& text);
@@ -53,6 +51,7 @@ class HighlightedText : public QObject
 
 public slots:
     void updateHighlighting();
+    void updateTabWidth(int tabWidth);
 
 private:
     KSyntaxHighlighting::Repository* m_repository;
@@ -61,4 +60,5 @@ public slots:
     QStringList m_lines;
     QStringList m_cleanedLines;
     bool m_isUsingAnsi = false;
+    int m_tabWidth = 8;
 };
diff --git a/src/models/sourcecodemodel.cpp b/src/models/sourcecodemodel.cpp
index 26b91012..8abd2674 100644
--- a/src/models/sourcecodemodel.cpp
+++ b/src/models/sourcecodemodel.cpp
@@ -23,9 +23,9 @@
 
 Q_LOGGING_CATEGORY(sourcecodemodel, "hotspot.sourcecodemodel", QtWarningMsg)
 
-SourceCodeModel::SourceCodeModel(KSyntaxHighlighting::Repository* repository, QObject* parent)
+SourceCodeModel::SourceCodeModel(KSyntaxHighlighting::Repository* repository, int tabWidth, QObject* parent)
     : QAbstractTableModel(parent)
-    , m_highlightedText(repository)
+    , m_highlightedText(repository, tabWidth)
 {
     qRegisterMetaType<QTextLine>();
 }
diff --git a/src/models/sourcecodemodel.h b/src/models/sourcecodemodel.h
index 94e38d3a..e4bafae0 100644
--- a/src/models/sourcecodemodel.h
+++ b/src/models/sourcecodemodel.h
@@ -28,7 +28,7 @@ class SourceCodeModel : public QAbstractTableModel
 {
     Q_OBJECT
 public:
-    explicit SourceCodeModel(KSyntaxHighlighting::Repository* repository, QObject* parent = nullptr);
+    explicit SourceCodeModel(KSyntaxHighlighting::Repository* repository, int tabWidth = 8, QObject* parent = nullptr);
     ~SourceCodeModel() override;
 
     void clear();
diff --git a/src/resultsdisassemblypage.cpp b/src/resultsdisassemblypage.cpp
index 813afe8a..fea6c92b 100644
--- a/src/resultsdisassemblypage.cpp
+++ b/src/resultsdisassemblypage.cpp
@@ -221,11 +221,11 @@ ResultsDisassemblyPage::ResultsDisassemblyPage(CostContextMenu* costContextMenu,
     , ui(std::make_unique<Ui::ResultsDisassemblyPage>())
 #if KFSyntaxHighlighting_FOUND
     , m_repository(std::make_unique<KSyntaxHighlighting::Repository>())
-    , m_disassemblyModel(new DisassemblyModel(m_repository.get(), this))
-    , m_sourceCodeModel(new SourceCodeModel(m_repository.get(), this))
+    , m_disassemblyModel(new DisassemblyModel(m_repository.get(), 8, this))
+    , m_sourceCodeModel(new SourceCodeModel(m_repository.get(), 8, this))
 #else
-    , m_disassemblyModel(new DisassemblyModel(nullptr, this))
-    , m_sourceCodeModel(new SourceCodeModel(nullptr, this))
+    , m_disassemblyModel(new DisassemblyModel(nullptr, 8, this))
+    , m_sourceCodeModel(new SourceCodeModel(nullptr, 8, this))
 #endif
     , m_disassemblyCostDelegate(new CostDelegate(DisassemblyModel::CostRole, DisassemblyModel::TotalCostRole, this))
     , m_sourceCodeCostDelegate(new CostDelegate(SourceCodeModel::CostRole, SourceCodeModel::TotalCostRole, this))
@@ -274,6 +274,9 @@ ResultsDisassemblyPage::ResultsDisassemblyPage(CostContextMenu* costContextMenu,
     connect(ui->assemblyView, &QTreeView::entered, this, updateFromDisassembly);
     connect(ui->sourceCodeView, &QTreeView::entered, this, updateFromSource);
 
+    connect(settings, &Settings::tabWidthChanged, this->m_sourceCodeModel->highlightedText(),
+            &HighlightedText::updateTabWidth);
+
     auto createContextMenu = [](QTreeView* view, auto* model, auto&& addEntries) {
         auto gotoMenuWidget = new QWidget(view);
         auto layout = new QHBoxLayout(gotoMenuWidget);
diff --git a/src/settings.cpp b/src/settings.cpp
index 8f1f13c7..8fc3eb81 100644
--- a/src/settings.cpp
+++ b/src/settings.cpp
@@ -253,6 +253,11 @@ void Settings::loadFromFile()
     connect(this, &Settings::showHexdumpChanged, [sharedConfig](bool showHexdump) {
         sharedConfig->group(QStringLiteral("Disassembly")).writeEntry("showHexdump", showHexdump);
     });
+
+    setTabWidth(sharedConfig->group(QStringLiteral("Disassembly")).readEntry("tabWidth", 8));
+    connect(this, &Settings::tabWidthChanged, [sharedConfig](int distance) {
+        sharedConfig->group(QStringLiteral("Disassembly")).writeEntry("tabWidth", distance);
+    });
 }
 
 void Settings::setSourceCodePaths(const QString& paths)
@@ -286,3 +291,11 @@ void Settings::setShowHexdump(bool showHexdump)
         emit showHexdumpChanged(m_showHexdump);
     }
 }
+
+void Settings::setTabWidth(int distance)
+{
+    if (m_tabWidth != distance) {
+        m_tabWidth = distance;
+        emit tabWidthChanged(m_tabWidth);
+    }
+}
diff --git a/src/settings.h b/src/settings.h
index 90d7d16b..bf396aae 100644
--- a/src/settings.h
+++ b/src/settings.h
@@ -163,6 +163,11 @@ class Settings : public QObject
         return m_showHexdump;
     }
 
+    int tabWidth() const
+    {
+        return m_tabWidth;
+    }
+
     void loadFromFile();
 
 signals:
@@ -187,6 +192,7 @@ class Settings : public QObject
     void perfPathChanged(const QString& perfPath);
     void showBranchesChanged(bool showBranches);
     void showHexdumpChanged(bool showHexdump);
+    void tabWidthChanged(int distance);
 
 public slots:
     void setPrettifySymbols(bool prettifySymbols);
@@ -212,6 +218,7 @@ public slots:
     void setPerfPath(const QString& path);
     void setShowBranches(bool showBranches);
     void setShowHexdump(bool showHexdump);
+    void setTabWidth(int distance);
 
 private:
     using QObject::QObject;
@@ -237,6 +244,7 @@ public slots:
     QString m_perfMapPath;
     bool m_showBranches = true;
     bool m_showHexdump = false;
+    int m_tabWidth = 8;
 
     QString m_lastUsedEnvironment;
 
diff --git a/src/settingsdialog.cpp b/src/settingsdialog.cpp
index e41defd2..2a4003db 100644
--- a/src/settingsdialog.cpp
+++ b/src/settingsdialog.cpp
@@ -337,10 +337,12 @@ void SettingsDialog::addSourcePathPage()
 
     disassemblyPage->showBranches->setChecked(settings->showBranches());
     disassemblyPage->showHexdump->setChecked(settings->showHexdump());
+    disassemblyPage->tabWidth->setValue(settings->tabWidth());
 
     connect(buttonBox(), &QDialogButtonBox::accepted, this, [this, colon, settings] {
         settings->setSourceCodePaths(disassemblyPage->sourcePaths->items().join(colon));
         settings->setShowBranches(disassemblyPage->showBranches->isChecked());
         settings->setShowHexdump(disassemblyPage->showHexdump->isChecked());
+        settings->setTabStopDistance(disassemblyPage->tabWidth->value());
     });
 }
diff --git a/tests/modeltests/tst_formatting.cpp b/tests/modeltests/tst_formatting.cpp
index 790a2a3e..54a91066 100644
--- a/tests/modeltests/tst_formatting.cpp
+++ b/tests/modeltests/tst_formatting.cpp
@@ -72,7 +72,7 @@ private slots:
         QFETCH(QStringList, ansiStrings);
         QFETCH(QVector<QVector<QTextLayout::FormatRange>>, formatting);
 
-        HighlightedText highlighter(nullptr);
+        HighlightedText highlighter(nullptr, 0, nullptr);
 
         highlighter.setText(ansiStrings);
 
@@ -101,7 +101,7 @@ private slots:
 
         auto repository = std::make_unique<KSyntaxHighlighting::Repository>();
 
-        HighlightedText text(repository.get());
+        HighlightedText text(repository.get(), 0);
         text.setText(testfunc);
         text.setDefinition(repository->definitionForFileName(QStringLiteral("test.cpp")));