diff --git a/src/gui/kernel/qguiapplication.cpp b/src/gui/kernel/qguiapplication.cpp
index 2df5933879..6550725faa 100644
--- a/src/gui/kernel/qguiapplication.cpp
+++ b/src/gui/kernel/qguiapplication.cpp
@@ -720,7 +720,7 @@ QGuiApplication::~QGuiApplication()
     QGuiApplicationPrivate::desktopFileName = nullptr;
     QGuiApplicationPrivate::mouse_buttons = Qt::NoButton;
     QGuiApplicationPrivate::modifier_buttons = Qt::NoModifier;
-    QGuiApplicationPrivate::lastCursorPosition = {qInf(), qInf()};
+    QGuiApplicationPrivate::lastCursorPosition = {qreal(qInf()), qreal(qInf())};
     QGuiApplicationPrivate::currentMousePressWindow = QGuiApplicationPrivate::currentMouseWindow = nullptr;
     QGuiApplicationPrivate::applicationState = Qt::ApplicationInactive;
     QGuiApplicationPrivate::highDpiScalingUpdated = false;
diff --git a/src/gui/painting/qemulationpaintengine.cpp b/src/gui/painting/qemulationpaintengine.cpp
index 7cd700a84a..a97cdf0b30 100644
--- a/src/gui/painting/qemulationpaintengine.cpp
+++ b/src/gui/painting/qemulationpaintengine.cpp
@@ -104,7 +104,7 @@ void QEmulationPaintEngine::fill(const QVectorPath &path, const QBrush &brush)
         }
     } else if (style == Qt::TexturePattern) {
         qreal dpr = qHasPixmapTexture(brush) ? brush.texture().devicePixelRatioF() : brush.textureImage().devicePixelRatioF();
-        if (!qFuzzyCompare(dpr, 1.0)) {
+        if (!qFuzzyCompare(dpr, qreal(1.0))) {
             QBrush copy = brush;
             combineXForm(&copy, QRectF(0, 0, 1.0/dpr, 1.0/dpr));
             real_engine->fill(path, copy);
diff --git a/src/gui/painting/qpaintengineex.cpp b/src/gui/painting/qpaintengineex.cpp
index 80feb2dbaa..d2d6b99f67 100644
--- a/src/gui/painting/qpaintengineex.cpp
+++ b/src/gui/painting/qpaintengineex.cpp
@@ -951,7 +951,7 @@ void QPaintEngineEx::drawTiledPixmap(const QRectF &r, const QPixmap &pixmap, con
 {
     QBrush brush(state()->pen.color(), pixmap);
     QTransform xform = QTransform::fromTranslate(r.x() - s.x(), r.y() - s.y());
-    if (!qFuzzyCompare(pixmap.devicePixelRatioF(), 1.0))
+    if (!qFuzzyCompare(pixmap.devicePixelRatioF(), qreal(1.0)))
         xform.scale(1.0/pixmap.devicePixelRatioF(), 1.0/pixmap.devicePixelRatioF());
     brush.setTransform(xform);
 
diff --git a/src/gui/painting/qpainter.cpp b/src/gui/painting/qpainter.cpp
index 8d16b44944..077e28b3e0 100644
--- a/src/gui/painting/qpainter.cpp
+++ b/src/gui/painting/qpainter.cpp
@@ -197,9 +197,9 @@ void QPainterPrivate::checkEmulation()
 
     if (state->brush.style() == Qt::TexturePattern) {
         if (qHasPixmapTexture(state->brush))
-            doEmulation |= !qFuzzyCompare(state->brush.texture().devicePixelRatioF(), 1.0);
+            doEmulation |= !qFuzzyCompare(state->brush.texture().devicePixelRatioF(), qreal(1.0));
         else
-            doEmulation |= !qFuzzyCompare(state->brush.textureImage().devicePixelRatioF(), 1.0);
+            doEmulation |= !qFuzzyCompare(state->brush.textureImage().devicePixelRatioF(), qreal(1.0));
     }
 
     if (doEmulation && extended->flags() & QPaintEngineEx::DoNotEmulate)
diff --git a/src/widgets/styles/qwindowsstyle.cpp b/src/widgets/styles/qwindowsstyle.cpp
index c402446df1..763431ecfe 100644
--- a/src/widgets/styles/qwindowsstyle.cpp
+++ b/src/widgets/styles/qwindowsstyle.cpp
@@ -856,7 +856,7 @@ void QWindowsStyle::drawPrimitive(PrimitiveElement pe, const QStyleOption *opt,
             QPointF  points[6];
             qreal scaleh = opt->rect.width() / 12.0;
             qreal scalev = opt->rect.height() / 12.0;
-            points[0] = { opt->rect.x() + 3.5 * scaleh, opt->rect.y() + 5.5 * scalev };
+            points[0] = { opt->rect.x() + qreal(3.5) * scaleh, opt->rect.y() + qreal(5.5) * scalev };
             points[1] = { points[0].x(),                points[0].y() + 2 * scalev };
             points[2] = { points[1].x() + 2 * scaleh,   points[1].y() + 2 * scalev };
             points[3] = { points[2].x() + 4 * scaleh,   points[2].y() - 4 * scalev };