diff --git a/src/plugins/debugger/debuggerplugin.cpp b/src/plugins/debugger/debuggerplugin.cpp
index 50ac0504a7d..e37c0df132b 100644
--- a/src/plugins/debugger/debuggerplugin.cpp
+++ b/src/plugins/debugger/debuggerplugin.cpp
@@ -836,7 +836,7 @@ DebuggerPluginPrivate::DebuggerPluginPrivate(const QStringList &arguments)
         vbox->insertWidget(0, label);
     };
 
-    const auto addFontSizeAdaptation = [](QWidget *widget) {
+    const auto addFontSizeAdaptation = [this](QWidget *widget) {
         QObject::connect(TextEditorSettings::instance(), &TextEditorSettings::fontSettingsChanged,
                 [widget](const FontSettings &settings) {
             if (!boolSetting(FontSizeFollowsEditor))