diff --git a/examples/dockindock/dockindock.cpp b/examples/dockindock/dockindock.cpp
index cf9bbeb..bacf42c 100644
--- a/examples/dockindock/dockindock.cpp
+++ b/examples/dockindock/dockindock.cpp
@@ -206,11 +206,15 @@ void DockInDockWidget::fillPerspectivesMenu( QMenu* menu )
     if ( !perspectiveNames.isEmpty() )
     {
         QMenu* load = menu->addMenu( "Load perspective" );
-        for ( auto name : perspectiveNames )
-            load->addAction( new LoadPerspectiveAction( load, name, *this ) );
+        for (const auto& name : perspectiveNames)
+        {
+            load->addAction(new LoadPerspectiveAction( load, name, *this));
+        }
         QMenu* remove = menu->addMenu( "Remove perspective" );
-        for ( auto name : perspectiveNames )
-            remove->addAction( new RemovePerspectiveAction( remove, name, *this ) );
+        for (const auto& name : perspectiveNames)
+        {
+            remove->addAction( new RemovePerspectiveAction( remove, name, *this ));
+        }
     }
 }
 
diff --git a/examples/dockindock/perspectives.cpp b/examples/dockindock/perspectives.cpp
index 29002b3..e788c22 100644
--- a/examples/dockindock/perspectives.cpp
+++ b/examples/dockindock/perspectives.cpp
@@ -219,8 +219,10 @@ void PerspectivesManager::loadPerspectives()
 
                 // load group info:
                 mainSettings->beginGroup(GROUP_PREFIX);
-                for ( auto key : mainSettings->allKeys() )
+                for (const auto& key : mainSettings->allKeys())
+                {
                     m_perspectives[perspective].groups[key] = mainSettings->value( key ).toStringList();
+                }
                 mainSettings->endGroup();
             }
             else
diff --git a/src/DockAreaWidget.cpp b/src/DockAreaWidget.cpp
index ab42bd2..6557ce7 100644
--- a/src/DockAreaWidget.cpp
+++ b/src/DockAreaWidget.cpp
@@ -1010,7 +1010,7 @@ bool CDockAreaWidget::isCentralWidgetArea() const
         return false;
     }
 
-    return dockManager()->centralWidget() == dockWidgets()[0];
+    return dockManager()->centralWidget() == dockWidgets().constFirst();
 }
 
 
diff --git a/src/DockContainerWidget.cpp b/src/DockContainerWidget.cpp
index 1d2539a..979e5ef 100644
--- a/src/DockContainerWidget.cpp
+++ b/src/DockContainerWidget.cpp
@@ -568,7 +568,6 @@ void DockContainerWidgetPrivate::dropIntoSection(CFloatingDockContainer* Floatin
 	}
 	else
 	{
-		QList<int> NewSplitterSizes;
 		QSplitter* NewSplitter = newSplitter(InsertParam.orientation());
 		int TargetAreaSize = (InsertParam.orientation() == Qt::Horizontal) ? TargetArea->width() : TargetArea->height();
 		bool AdjustSplitterSizes = true;
@@ -692,7 +691,6 @@ void DockContainerWidgetPrivate::moveToNewSection(QWidget* Widget, CDockAreaWidg
 	}
 	else
 	{
-		auto Sizes = TargetAreaSplitter->sizes();
 		int TargetAreaSize = (InsertParam.orientation() == Qt::Horizontal) ? TargetArea->width() : TargetArea->height();
 		QSplitter* NewSplitter = newSplitter(InsertParam.orientation());
 		NewSplitter->addWidget(TargetArea);
diff --git a/src/DockManager.cpp b/src/DockManager.cpp
index ea98221..8ef5de5 100644
--- a/src/DockManager.cpp
+++ b/src/DockManager.cpp
@@ -928,7 +928,7 @@ void CDockManager::removePerspective(const QString& Name)
 void CDockManager::removePerspectives(const QStringList& Names)
 {
 	int Count = 0;
-	for (auto Name : Names)
+	for (const auto& Name : Names)
 	{
 		Count += d->Perspectives.remove(Name);
 	}