diff --git a/src/libs/modelinglib/qmt/diagram_scene/items/objectitem.cpp b/src/libs/modelinglib/qmt/diagram_scene/items/objectitem.cpp
index b68ed9a4f7f..2b04d6b2ce6 100644
--- a/src/libs/modelinglib/qmt/diagram_scene/items/objectitem.cpp
+++ b/src/libs/modelinglib/qmt/diagram_scene/items/objectitem.cpp
@@ -1008,8 +1008,8 @@ void ObjectItem::contextMenuEvent(QGraphicsSceneContextMenuEvent *event)
         menu.addSeparator();
     menu.addAction(new ContextMenuAction(tr("Remove"), "remove",
                                          QKeySequence(QKeySequence::Delete), &menu));
-    menu.addAction(new ContextMenuAction(tr("Delete"), "delete",
-                                         QKeySequence(Qt::CTRL + Qt::Key_D), &menu));
+    menu.addAction(
+        new ContextMenuAction(tr("Delete"), "delete", QKeySequence(Qt::CTRL | Qt::Key_D), &menu));
     //menu.addAction(new ContextMenuAction(tr("Select in Model Tree"), "selectInModelTree", &menu));
     QMenu alignMenu;
     alignMenu.setTitle(tr("Align Objects"));
diff --git a/src/libs/modelinglib/qmt/model_widgets_ui/modeltreeview.cpp b/src/libs/modelinglib/qmt/model_widgets_ui/modeltreeview.cpp
index 5ad40944f67..4a3d2472a56 100644
--- a/src/libs/modelinglib/qmt/model_widgets_ui/modeltreeview.cpp
+++ b/src/libs/modelinglib/qmt/model_widgets_ui/modeltreeview.cpp
@@ -260,8 +260,10 @@ void ModelTreeView::contextMenuEvent(QContextMenuEvent *event)
         if (melement->owner()) {
             if (addSeparator)
                 menu.addSeparator();
-            menu.addAction(new ContextMenuAction(tr("Delete"), "delete",
-                                                 QKeySequence(Qt::CTRL + Qt::Key_D), &menu));
+            menu.addAction(new ContextMenuAction(tr("Delete"),
+                                                 "delete",
+                                                 QKeySequence(Qt::CTRL | Qt::Key_D),
+                                                 &menu));
         }
         QAction *selectedAction = menu.exec(event->globalPos());
         if (selectedAction) {
diff --git a/src/plugins/coreplugin/dialogs/shortcutsettings.cpp b/src/plugins/coreplugin/dialogs/shortcutsettings.cpp
index cf88311efe0..46c4e6699dc 100644
--- a/src/plugins/coreplugin/dialogs/shortcutsettings.cpp
+++ b/src/plugins/coreplugin/dialogs/shortcutsettings.cpp
@@ -117,12 +117,18 @@ static QKeySequence keySequenceFromEditString(const QString &editString)
     return QKeySequence::fromString(text, QKeySequence::PortableText);
 }
 
+#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
+using KeyCombination = int;
+#else
+using KeyCombination = QKeyCombination;
+#endif
+
 static bool keySequenceIsValid(const QKeySequence &sequence)
 {
     if (sequence.isEmpty())
         return false;
     for (int i = 0; i < sequence.count(); ++i) {
-        if (sequence[i] == Qt::Key_unknown)
+        if (sequence[i] == KeyCombination(Qt::Key_unknown))
             return false;
     }
     return true;
diff --git a/src/plugins/qmldesigner/components/formeditor/formeditorwidget.cpp b/src/plugins/qmldesigner/components/formeditor/formeditorwidget.cpp
index c8c54f6a53f..7300735cc38 100644
--- a/src/plugins/qmldesigner/components/formeditor/formeditorwidget.cpp
+++ b/src/plugins/qmldesigner/components/formeditor/formeditorwidget.cpp
@@ -175,7 +175,7 @@ FormEditorWidget::FormEditorWidget(FormEditorView *view) :
                                                                       28, 28, textColorNormal);
 
     m_zoomInAction = new QAction(zoomInIcon, tr("Zoom in"), this);
-    m_zoomInAction->setShortcut(QKeySequence(Qt::CTRL + Qt::ALT + Qt::Key_Plus));
+    m_zoomInAction->setShortcut(QKeySequence(Qt::CTRL | Qt::ALT | Qt::Key_Plus));
     connect(m_zoomInAction.data(), &QAction::triggered, this, [this] {
         if (!m_formEditorView)
             return;
@@ -187,7 +187,7 @@ FormEditorWidget::FormEditorWidget(FormEditorView *view) :
     m_toolBox->addRightSideAction(m_zoomInAction.data());
 
     m_zoomOutAction = new QAction(zoomOutIcon, tr("Zoom out"), this);
-    m_zoomOutAction->setShortcut(QKeySequence(Qt::CTRL + Qt::ALT + Qt::Key_Minus));
+    m_zoomOutAction->setShortcut(QKeySequence(Qt::CTRL | Qt::ALT | Qt::Key_Minus));
     connect(m_zoomOutAction.data(), &QAction::triggered, this, [this] {
         if (!m_formEditorView)
             return;
@@ -206,7 +206,7 @@ FormEditorWidget::FormEditorWidget(FormEditorView *view) :
     m_toolBox->addRightSideAction(m_zoomAction.data());
 
     m_zoomAllAction = new QAction(zoomAllIcon, tr("Zoom screen to fit all content"), this);
-    m_zoomAllAction->setShortcut(QKeySequence(Qt::CTRL + Qt::ALT + Qt::Key_0));
+    m_zoomAllAction->setShortcut(QKeySequence(Qt::CTRL | Qt::ALT | Qt::Key_0));
     connect(m_zoomAllAction.data(), &QAction::triggered, this, [this] {
         if (!m_formEditorView)
             return;
@@ -218,7 +218,7 @@ FormEditorWidget::FormEditorWidget(FormEditorView *view) :
     m_toolBox->addRightSideAction(m_zoomAllAction.data());
 
     m_zoomSelectionAction = new QAction(zoomSelectionIcon, tr("Zoom screen to fit current selection"), this);
-    m_zoomSelectionAction->setShortcut(QKeySequence(Qt::CTRL + Qt::ALT + Qt::Key_I));
+    m_zoomSelectionAction->setShortcut(QKeySequence(Qt::CTRL | Qt::ALT | Qt::Key_I));
     connect(m_zoomSelectionAction.data(), &QAction::triggered, this, [this] {
         if (!m_formEditorView)
             return;
diff --git a/src/plugins/qmldesigner/components/texteditor/texteditorwidget.cpp b/src/plugins/qmldesigner/components/texteditor/texteditorwidget.cpp
index d47505d70e7..a1e2cb6fc16 100644
--- a/src/plugins/qmldesigner/components/texteditor/texteditorwidget.cpp
+++ b/src/plugins/qmldesigner/components/texteditor/texteditorwidget.cpp
@@ -185,11 +185,11 @@ bool TextEditorWidget::eventFilter( QObject *, QEvent *event)
     static std::vector<QKeySequence> overrideSequences = { QKeySequence::SelectAll, QKeySequence::Cut,
                                                            QKeySequence::Copy, QKeySequence::Delete,
                                                            QKeySequence::Paste, QKeySequence::Undo,
-                                                           QKeySequence::Redo, QKeySequence(Qt::CTRL + Qt::ALT),
-                                                           QKeySequence(Qt::Key_Left + Qt::CTRL),
-                                                           QKeySequence(Qt::Key_Right + Qt::CTRL),
-                                                           QKeySequence(Qt::Key_Up + Qt::CTRL),
-                                                           QKeySequence(Qt::Key_Down + Qt::CTRL)
+                                                           QKeySequence::Redo, QKeySequence(Qt::CTRL | Qt::ALT),
+                                                           QKeySequence(Qt::Key_Left | Qt::CTRL),
+                                                           QKeySequence(Qt::Key_Right | Qt::CTRL),
+                                                           QKeySequence(Qt::Key_Up | Qt::CTRL),
+                                                           QKeySequence(Qt::Key_Down | Qt::CTRL)
                                                          };
     if (event->type() == QEvent::ShortcutOverride) {
         auto keyEvent = static_cast<QKeyEvent *>(event);
diff --git a/src/plugins/qmljseditor/qmljseditorplugin.cpp b/src/plugins/qmljseditor/qmljseditorplugin.cpp
index 9e82914fb81..7414a1a972b 100644
--- a/src/plugins/qmljseditor/qmljseditorplugin.cpp
+++ b/src/plugins/qmljseditor/qmljseditorplugin.cpp
@@ -191,8 +191,8 @@ QmlJSEditorPluginPrivate::QmlJSEditorPluginPrivate()
 
     QAction *showQuickToolbar = new QAction(QmlJSEditorPlugin::tr("Show Qt Quick Toolbar"), this);
     cmd = ActionManager::registerAction(showQuickToolbar, Constants::SHOW_QT_QUICK_HELPER, context);
-    cmd->setDefaultKeySequence(useMacShortcuts ? QKeySequence(Qt::META + Qt::ALT + Qt::Key_Space)
-                                                     : QKeySequence(Qt::CTRL + Qt::ALT + Qt::Key_Space));
+    cmd->setDefaultKeySequence(useMacShortcuts ? QKeySequence(Qt::META | Qt::ALT | Qt::Key_Space)
+                                               : QKeySequence(Qt::CTRL | Qt::ALT | Qt::Key_Space));
     connect(showQuickToolbar, &QAction::triggered, this, &QmlJSEditorPluginPrivate::showContextPane);
     contextMenu->addAction(cmd);
     qmlToolsMenu->addAction(cmd);