diff --git a/examples/corelib/threads/queuedcustomtype/main.cpp b/examples/corelib/threads/queuedcustomtype/main.cpp
index 28e7687f026..0a14cb48e1b 100644
--- a/examples/corelib/threads/queuedcustomtype/main.cpp
+++ b/examples/corelib/threads/queuedcustomtype/main.cpp
@@ -48,8 +48,8 @@ QImage createImage(int width, int height)
 
     int x = 0;
     int y = 0;
-    int starWidth = image.width()/3;
-    int starHeight = image.height()/3;
+    const int starWidth = image.width()/3;
+    const int starHeight = image.height()/3;
 
     QRect rect(x, y, starWidth, starHeight);
 
diff --git a/examples/corelib/threads/queuedcustomtype/renderthread.cpp b/examples/corelib/threads/queuedcustomtype/renderthread.cpp
index deb518e2b1f..5a65f4ca76c 100644
--- a/examples/corelib/threads/queuedcustomtype/renderthread.cpp
+++ b/examples/corelib/threads/queuedcustomtype/renderthread.cpp
@@ -35,21 +35,21 @@ void RenderThread::processImage(const QImage &image)
 
 void RenderThread::run()
 {
-    int size = qMax(m_image.width()/20, m_image.height()/20);
+    const int size = qMax(m_image.width()/20, m_image.height()/20);
     for (int s = size; s > 0; --s) {
         for (int c = 0; c < 400; ++c) {
 //![processing the image (start)]
-            int x1 = qMax(0, QRandomGenerator::global()->bounded(m_image.width()) - s/2);
-            int x2 = qMin(x1 + s/2 + 1, m_image.width());
-            int y1 = qMax(0, QRandomGenerator::global()->bounded(m_image.height()) - s/2);
-            int y2 = qMin(y1 + s/2 + 1, m_image.height());
+            const int x1 = qMax(0, QRandomGenerator::global()->bounded(m_image.width()) - s/2);
+            const int x2 = qMin(x1 + s/2 + 1, m_image.width());
+            const int y1 = qMax(0, QRandomGenerator::global()->bounded(m_image.height()) - s/2);
+            const int y2 = qMin(y1 + s/2 + 1, m_image.height());
             int n = 0;
             int red = 0;
             int green = 0;
             int blue = 0;
             for (int i = y1; i < y2; ++i) {
                 for (int j = x1; j < x2; ++j) {
-                    QRgb pixel = m_image.pixel(j, i);
+                    const QRgb pixel = m_image.pixel(j, i);
                     red += qRed(pixel);
                     green += qGreen(pixel);
                     blue += qBlue(pixel);
@@ -57,7 +57,7 @@ void RenderThread::run()
                 }
             }
 //![processing the image (finish)]
-            Block block(QRect(x1, y1, x2 - x1 + 1, y2 - y1 + 1),
+            const Block block(QRect(x1, y1, x2 - x1 + 1, y2 - y1 + 1),
                         QColor(red/n, green/n, blue/n));
             emit sendBlock(block);
             if (m_abort)
diff --git a/examples/corelib/threads/queuedcustomtype/window.cpp b/examples/corelib/threads/queuedcustomtype/window.cpp
index a91b2e6b8d2..9a56007b40b 100644
--- a/examples/corelib/threads/queuedcustomtype/window.cpp
+++ b/examples/corelib/threads/queuedcustomtype/window.cpp
@@ -60,13 +60,13 @@ void Window::loadImage()
         if (format.toLower() == format)
             formats.append(QLatin1String("*.") + QString::fromLatin1(format));
 
-    QString newPath = QFileDialog::getOpenFileName(this, tr("Open Image"),
+    const QString newPath = QFileDialog::getOpenFileName(this, tr("Open Image"),
         path, tr("Image files (%1)").arg(formats.join(' ')));
 
     if (newPath.isEmpty())
         return;
 
-    QImage image(newPath);
+    const QImage image(newPath);
     if (!image.isNull()) {
         loadImage(image);
         path = newPath;
@@ -76,7 +76,7 @@ void Window::loadImage()
 void Window::loadImage(const QImage &image)
 {
     QImage useImage;
-    QRect space = QGuiApplication::primaryScreen()->availableGeometry();
+    const QRect space = QGuiApplication::primaryScreen()->availableGeometry();
     if (image.width() > 0.75*space.width() || image.height() > 0.75*space.height())
         useImage = image.scaled(0.75*space.width(), 0.75*space.height(),
                                 Qt::KeepAspectRatio, Qt::SmoothTransformation);