diff --git a/src/plugins/fakevim/fakevimplugin.cpp b/src/plugins/fakevim/fakevimplugin.cpp
index 8cb623c0879..bed990c0511 100644
--- a/src/plugins/fakevim/fakevimplugin.cpp
+++ b/src/plugins/fakevim/fakevimplugin.cpp
@@ -1048,7 +1048,7 @@ void FakeVimPluginPrivate::initialize()
         INSTALL_HANDLER, Context(Core::Constants::C_GLOBAL), true);
     cmd->setDefaultKeySequence(QKeySequence(useMacShortcuts ? Tr::tr("Meta+Shift+Y,Meta+Shift+Y")
                                                             : Tr::tr("Alt+Y,Alt+Y")));
-    connect(cmd->action(), &QAction::triggered, [this] { settings().writeSettings(); });
+    connect(cmd->action(), &QAction::triggered, [] { settings().writeSettings(); });
 
     ActionContainer *advancedMenu =
         ActionManager::actionContainer(Core::Constants::M_EDIT_ADVANCED);
diff --git a/src/plugins/fossil/configuredialog.h b/src/plugins/fossil/configuredialog.h
index 9fc0ea652db..eddc15d4757 100644
--- a/src/plugins/fossil/configuredialog.h
+++ b/src/plugins/fossil/configuredialog.h
@@ -11,7 +11,7 @@ namespace Internal {
 struct RepositorySettings;
 class ConfigureDialogPrivate;
 
-class ConfigureDialog : public QDialog
+class ConfigureDialog final : public QDialog
 {
     Q_OBJECT
 
diff --git a/src/plugins/haskell/haskellplugin.h b/src/plugins/haskell/haskellplugin.h
index acae0d2001a..041681dcbc1 100644
--- a/src/plugins/haskell/haskellplugin.h
+++ b/src/plugins/haskell/haskellplugin.h
@@ -10,7 +10,7 @@
 namespace Haskell {
 namespace Internal {
 
-class HaskellPlugin : public ExtensionSystem::IPlugin
+class HaskellPlugin final : public ExtensionSystem::IPlugin
 {
     Q_OBJECT
     Q_PLUGIN_METADATA(IID "org.qt-project.Qt.QtCreatorPlugin" FILE "Haskell.json")