diff --git a/src/controls/QskQuick.cpp b/src/controls/QskQuick.cpp
index b4dabdc4..6f71bca4 100644
--- a/src/controls/QskQuick.cpp
+++ b/src/controls/QskQuick.cpp
@@ -637,7 +637,7 @@ void qskItemUpdateRecursive( QQuickItem* item )
 
 static const QQuickPointerTouchEvent* qskPointerPressEvent( const QQuickWindowPrivate* wd )
 {
-    for ( const auto event : wd->pointerEventInstances )
+    for ( const auto event : qAsConst( wd->pointerEventInstances ) )
     {
         if ( auto touchEvent = event->asPointerTouchEvent() )
         {
diff --git a/src/controls/QskSkinlet.cpp b/src/controls/QskSkinlet.cpp
index 8dda9f18..9e2b7a35 100644
--- a/src/controls/QskSkinlet.cpp
+++ b/src/controls/QskSkinlet.cpp
@@ -263,7 +263,7 @@ void QskSkinlet::updateNode( QskSkinnable* skinnable, QSGNode* parentNode ) cons
         replaceChildNode( DebugRole, parentNode, oldNode, newNode );
     }
 
-    for ( const auto nodeRole : m_data->nodeRoles )
+    for ( const auto nodeRole : qAsConst( m_data->nodeRoles ) )
     {
         Q_ASSERT( nodeRole < FirstReservedRole );
 
diff --git a/src/layouts/QskStackBox.cpp b/src/layouts/QskStackBox.cpp
index 7d6a03fc..44206cb4 100644
--- a/src/layouts/QskStackBox.cpp
+++ b/src/layouts/QskStackBox.cpp
@@ -376,7 +376,7 @@ QSizeF QskStackBox::layoutSizeHint(
     qreal w = -1.0;
     qreal h = -1.0;
 
-    for ( const auto item : m_data->items )
+    for ( const auto item : qAsConst( m_data->items ) )
     {
         /*
             We ignore the retainSizeWhenVisible flag and include all