diff --git a/src/widgets/styles/qcommonstyle.cpp b/src/widgets/styles/qcommonstyle.cpp
index e04e81c789..be6507f1ed 100644
--- a/src/widgets/styles/qcommonstyle.cpp
+++ b/src/widgets/styles/qcommonstyle.cpp
@@ -2910,7 +2910,7 @@ QRect QCommonStyle::subElementRect(SubElement sr, const QStyleOption *opt,
                                         opt, widget).actualSize(QSize(iconSize, iconSize));
                 sz += QSize(buttonMargin, buttonMargin);
                 if (verticalTitleBar)
-                    sz.transpose();
+                    sz = sz.transposed();
                 closeRect = QRect(right - sz.width(),
                                     rect.center().y() - sz.height()/2,
                                     sz.width(), sz.height());
@@ -2927,7 +2927,7 @@ QRect QCommonStyle::subElementRect(SubElement sr, const QStyleOption *opt,
                                         opt, widget).actualSize(QSize(iconSize, iconSize));
                 sz += QSize(buttonMargin, buttonMargin);
                 if (verticalTitleBar)
-                    sz.transpose();
+                    sz = sz.transposed();
                 floatRect = QRect(right - sz.width(),
                                     rect.center().y() - sz.height()/2,
                                     sz.width(), sz.height());
@@ -2947,7 +2947,7 @@ QRect QCommonStyle::subElementRect(SubElement sr, const QStyleOption *opt,
                         && icon.cacheKey() != QApplication::windowIcon().cacheKey()) {
                     QSize sz = icon.actualSize(QSize(r.height(), r.height()));
                     if (verticalTitleBar)
-                        sz.transpose();
+                        sz = sz.transposed();
                     iconRect = QRect(left, rect.center().y() - sz.height()/2,
                                         sz.width(), sz.height());
                     left = iconRect.right() + margin;
diff --git a/src/widgets/styles/qmacstyle_mac.mm b/src/widgets/styles/qmacstyle_mac.mm
index c586cbb0d2..40a2ca7f14 100644
--- a/src/widgets/styles/qmacstyle_mac.mm
+++ b/src/widgets/styles/qmacstyle_mac.mm
@@ -5207,7 +5207,7 @@ QRect QMacStyle::subElementRect(SubElement sr, const QStyleOption *opt,
                                             opt, widget).actualSize(QSize(iconSize, iconSize));
                     sz += QSize(buttonMargin, buttonMargin);
                     if (verticalTitleBar)
-                        sz.transpose();
+                        sz = sz.transposed();
                     closeRect = QRect(left,
                                       srect.center().y() - sz.height()/2,
                                       sz.width(), sz.height());
@@ -5224,7 +5224,7 @@ QRect QMacStyle::subElementRect(SubElement sr, const QStyleOption *opt,
                                             opt, widget).actualSize(QSize(iconSize, iconSize));
                     sz += QSize(buttonMargin, buttonMargin);
                     if (verticalTitleBar)
-                        sz.transpose();
+                        sz = sz.transposed();
                     floatRect = QRect(left,
                                       srect.center().y() - sz.height()/2,
                                       sz.width(), sz.height());
@@ -5244,7 +5244,7 @@ QRect QMacStyle::subElementRect(SubElement sr, const QStyleOption *opt,
                         && icon.cacheKey() != QApplication::windowIcon().cacheKey()) {
                         QSize sz = icon.actualSize(QSize(rect.height(), rect.height()));
                         if (verticalTitleBar)
-                            sz.transpose();
+                            sz = sz.transposed();
                         iconRect = QRect(right - sz.width(), srect.center().y() - sz.height()/2,
                                          sz.width(), sz.height());
                         right = iconRect.left() - 1;
@@ -6625,7 +6625,7 @@ QSize QMacStyle::sizeFromContents(ContentsType ct, const QStyleOption *opt,
             ThemeTabDirection ttd = getTabDirection(tab->shape);
             bool vertTabs = ttd == kThemeTabWest || ttd == kThemeTabEast;
             if (vertTabs)
-                sz.transpose();
+                sz = sz.transposed();
             int defaultTabHeight;
             int defaultExtraSpace = proxy()->pixelMetric(PM_TabBarTabHSpace, tab, widget); // Remove spurious gcc warning (AFAIK)
             QFontMetrics fm = opt->fontMetrics;
@@ -6655,7 +6655,7 @@ QSize QMacStyle::sizeFromContents(ContentsType ct, const QStyleOption *opt,
             }
 
             if (vertTabs)
-                sz.transpose();
+                sz = sz.transposed();
 
             int maxWidgetHeight = qMax(tab->leftButtonSize.height(), tab->rightButtonSize.height());
             int maxWidgetWidth = qMax(tab->leftButtonSize.width(), tab->rightButtonSize.width());
diff --git a/src/widgets/widgets/qmainwindowlayout.cpp b/src/widgets/widgets/qmainwindowlayout.cpp
index 9e8e0aee27..75fef35968 100644
--- a/src/widgets/widgets/qmainwindowlayout.cpp
+++ b/src/widgets/widgets/qmainwindowlayout.cpp
@@ -1261,8 +1261,8 @@ bool QMainWindowTabBar::event(QEvent *e)
     QSize size = this->size();
     QSize hint = sizeHint();
     if (shape() == QTabBar::RoundedWest || shape() == QTabBar::RoundedEast) {
-        size.transpose();
-        hint.transpose();
+        size = size.transposed();
+        hint = hint.transposed();
     }
     if (size.width() < hint.width())
         return QTabBar::event(e);
diff --git a/src/widgets/widgets/qprogressbar.cpp b/src/widgets/widgets/qprogressbar.cpp
index 1c76bd0ac1..89d2243299 100644
--- a/src/widgets/widgets/qprogressbar.cpp
+++ b/src/widgets/widgets/qprogressbar.cpp
@@ -426,7 +426,7 @@ QSize QProgressBar::sizeHint() const
     int cw = style()->pixelMetric(QStyle::PM_ProgressBarChunkWidth, &opt, this);
     QSize size = QSize(qMax(9, cw) * 7 + fm.width(QLatin1Char('0')) * 4, fm.height() + 8);
     if (opt.orientation == Qt::Vertical)
-        size.transpose();
+        size = size.transposed();
     return style()->sizeFromContents(QStyle::CT_ProgressBar, &opt, size, this);
 }