diff --git a/src/plugins/coreplugin/externaltool.cpp b/src/plugins/coreplugin/externaltool.cpp
index 6ab6370bc0b..23231557601 100644
--- a/src/plugins/coreplugin/externaltool.cpp
+++ b/src/plugins/coreplugin/externaltool.cpp
@@ -809,11 +809,11 @@ void ExternalToolManager::setToolsByCategory(const QMap<QString, QList<Internal:
     }
     qDeleteAll(m_tools);
     QMapIterator<QString, QAction *> remainingActions(m_actions);
-    const QString externalToolsPrefix = QLatin1String("Tools.External.");
+    const Id externalToolsPrefix = Id("Tools.External.");
     while (remainingActions.hasNext()) {
         remainingActions.next();
         ActionManager::unregisterAction(remainingActions.value(),
-            Id::fromString(externalToolsPrefix + remainingActions.key()));
+            externalToolsPrefix.withSuffix(remainingActions.key()));
         delete remainingActions.value();
     }
     m_actions.clear();
@@ -835,7 +835,7 @@ void ExternalToolManager::setToolsByCategory(const QMap<QString, QList<Internal:
             if (m_containers.contains(containerName))
                 container = m_containers.take(containerName); // remove to avoid deletion below
             else
-                container = ActionManager::createMenu(Id::fromString(QLatin1String("Tools.External.Category.") + containerName));
+                container = ActionManager::createMenu(Id("Tools.External.Category.").withSuffix(containerName));
             newContainers.insert(containerName, container);
             mexternaltools->addMenu(container, Constants::G_DEFAULT_ONE);
             container->menu()->setTitle(containerName);
@@ -847,13 +847,13 @@ void ExternalToolManager::setToolsByCategory(const QMap<QString, QList<Internal:
             Command *command = 0;
             if (m_actions.contains(toolId)) {
                 action = m_actions.value(toolId);
-                command = ActionManager::command(Id::fromString(externalToolsPrefix + toolId));
+                command = ActionManager::command(externalToolsPrefix.withSuffix(toolId));
             } else {
                 action = new QAction(tool->displayName(), this);
                 action->setData(toolId);
                 m_actions.insert(toolId, action);
                 connect(action, SIGNAL(triggered()), this, SLOT(menuActivated()));
-                command = ActionManager::registerAction(action, Id::fromString(externalToolsPrefix + toolId), Context(Constants::C_GLOBAL));
+                command = ActionManager::registerAction(action, externalToolsPrefix.withSuffix(toolId), Context(Constants::C_GLOBAL));
                 command->setAttribute(Command::CA_UpdateText);
             }
             action->setText(tool->displayName());
diff --git a/src/plugins/coreplugin/outputpanemanager.cpp b/src/plugins/coreplugin/outputpanemanager.cpp
index 1fe2d7491ac..39629d3bc5f 100644
--- a/src/plugins/coreplugin/outputpanemanager.cpp
+++ b/src/plugins/coreplugin/outputpanemanager.cpp
@@ -246,6 +246,7 @@ void OutputPaneManager::init()
     const int n = m_panes.size();
 
     int shortcutNumber = 1;
+    const Id baseId = Id("QtCreator.Pane.");
     for (int i = 0; i != n; ++i) {
         IOutputPane *outPane = m_panes.at(i);
         const int idx = m_outputWidgetPane->addWidget(outPane->outputWidget(this));
@@ -271,9 +272,9 @@ void OutputPaneManager::init()
 
         minTitleWidth = qMax(minTitleWidth, titleFm.width(outPane->displayName()));
 
-        QString actionId = QLatin1String("QtCreator.Pane.") + outPane->displayName().simplified();
-        actionId.remove(QLatin1Char(' '));
-        Id id = Id::fromString(actionId);
+        QString suffix = outPane->displayName().simplified();
+        suffix.remove(QLatin1Char(' '));
+        const Id id = baseId.withSuffix(suffix);
         QAction *action = new QAction(outPane->displayName(), this);
         Command *cmd = ActionManager::registerAction(action, id, globalContext);
 
diff --git a/src/plugins/find/findplugin.cpp b/src/plugins/find/findplugin.cpp
index dde1b4d82bd..8b0555943ab 100644
--- a/src/plugins/find/findplugin.cpp
+++ b/src/plugins/find/findplugin.cpp
@@ -227,6 +227,7 @@ void FindPlugin::setupFilterMenuItems()
     Core::ActionContainer *mfindadvanced = Core::ActionManager::actionContainer(Constants::M_FIND_ADVANCED);
     d->m_filterActions.clear();
     bool haveEnabledFilters = false;
+    const Core::Id base("FindFilter.");
     foreach (IFindFilter *filter, findInterfaces) {
         QAction *action = new QAction(QLatin1String("    ") + filter->displayName(), this);
         bool isEnabled = filter->isEnabled();
@@ -235,7 +236,7 @@ void FindPlugin::setupFilterMenuItems()
         action->setEnabled(isEnabled);
         action->setData(qVariantFromValue(filter));
         cmd = Core::ActionManager::registerAction(action,
-            Core::Id::fromString(QLatin1String("FindFilter.")+filter->id()), globalcontext);
+            base.withSuffix(filter->id()), globalcontext);
         cmd->setDefaultKeySequence(filter->defaultShortcut());
         mfindadvanced->addAction(cmd);
         d->m_filterActions.insert(filter, action);
diff --git a/src/plugins/macros/macromanager.cpp b/src/plugins/macros/macromanager.cpp
index 12372f855ec..99ff767af04 100644
--- a/src/plugins/macros/macromanager.cpp
+++ b/src/plugins/macros/macromanager.cpp
@@ -157,7 +157,7 @@ void MacroManager::MacroManagerPrivate::initialize()
 
 static Core::Id makeId(const QString &name)
 {
-    return Core::Id::fromString(QLatin1String(Constants::PREFIX_MACRO) + name);
+    return Core::Id(Constants::PREFIX_MACRO).withSuffix(name);
 }
 
 void MacroManager::MacroManagerPrivate::addMacro(Macro *macro)
diff --git a/src/plugins/macros/macrooptionswidget.cpp b/src/plugins/macros/macrooptionswidget.cpp
index 7c8106e6f5e..629d6f40337 100644
--- a/src/plugins/macros/macrooptionswidget.cpp
+++ b/src/plugins/macros/macrooptionswidget.cpp
@@ -99,6 +99,7 @@ void MacroOptionsWidget::initialize()
 void MacroOptionsWidget::createTable()
 {
     QDir dir(MacroManager::instance()->macrosDirectory());
+    const Core::Id base = Core::Id(Constants::PREFIX_MACRO);
     QMapIterator<QString, Macro *> it(MacroManager::instance()->macros());
     while (it.hasNext()) {
         it.next();
@@ -111,8 +112,7 @@ void MacroOptionsWidget::createTable()
             macroItem->setData(0, WRITE_ROLE, it.value()->isWritable());
 
             Core::Command *command =
-                    Core::ActionManager::command(Core::Id::fromString(QLatin1String(Constants::PREFIX_MACRO)
-                                                          + it.value()->displayName()));
+                    Core::ActionManager::command(base.withSuffix(it.value()->displayName()));
             if (command && command->shortcut())
                 macroItem->setText(2, command->shortcut()->key().toString());
         }