diff --git a/src/widgets/util/qscroller.cpp b/src/widgets/util/qscroller.cpp
index bc7c11127ec..5297c949a9c 100644
--- a/src/widgets/util/qscroller.cpp
+++ b/src/widgets/util/qscroller.cpp
@@ -1005,7 +1005,7 @@ bool QScroller::handleInput(Input input, const QPointF &position, qint64 timesta
 #if !defined(Q_DEAD_CODE_FROM_QT4_MAC)
 // the Mac version is implemented in qscroller_mac.mm
 
-QPointF QScrollerPrivate::realDpi(int screen)
+QPointF QScrollerPrivate::realDpi(int screen) const
 {
 #  if defined(Q_DEAD_CODE_FROM_QT4_X11) && !defined(QT_NO_XRANDR)
     if (X11 && X11->use_xrandr && X11->ptrXRRSizes && X11->ptrXRRRootToScreen) {
@@ -1176,9 +1176,9 @@ qreal QScrollerPrivate::scrollingSegmentsEndPos(Qt::Orientation orientation) con
 /*! \internal
     Checks if the scroller segment end in a valid position.
 */
-bool QScrollerPrivate::scrollingSegmentsValid(Qt::Orientation orientation)
+bool QScrollerPrivate::scrollingSegmentsValid(Qt::Orientation orientation) const
 {
-    QQueue<ScrollSegment> *segments;
+    const QQueue<ScrollSegment> *segments;
     qreal minPos;
     qreal maxPos;
 
@@ -1893,7 +1893,7 @@ void QScrollerPrivate::setContentPositionHelperScrolling()
     on a snap point.
     Returns the nearest snap position or NaN if no such point could be found.
  */
-qreal QScrollerPrivate::nextSnapPos(qreal p, int dir, Qt::Orientation orientation)
+qreal QScrollerPrivate::nextSnapPos(qreal p, int dir, Qt::Orientation orientation) const
 {
     qreal bestSnapPos = Q_QNAN;
     qreal bestSnapPosDist = Q_INFINITY;
diff --git a/src/widgets/util/qscroller_mac.mm b/src/widgets/util/qscroller_mac.mm
index 51485973b8f..1d2780ccd1d 100644
--- a/src/widgets/util/qscroller_mac.mm
+++ b/src/widgets/util/qscroller_mac.mm
@@ -41,7 +41,7 @@
 
 QT_BEGIN_NAMESPACE
 
-QPointF QScrollerPrivate::realDpi(int screen)
+QPointF QScrollerPrivate::realDpi(int screen) const
 {
     QMacAutoReleasePool pool;
     NSArray *nsscreens = [NSScreen screens];
diff --git a/src/widgets/util/qscroller_p.h b/src/widgets/util/qscroller_p.h
index d09f78d1300..8266b6e6117 100644
--- a/src/widgets/util/qscroller_p.h
+++ b/src/widgets/util/qscroller_p.h
@@ -112,7 +112,7 @@ public:
     bool prepareScrolling(const QPointF &position);
     void handleDrag(const QPointF &position, qint64 timestamp);
 
-    QPointF realDpi(int screen);
+    QPointF realDpi(int screen) const;
     QPointF dpi() const;
     void setDpi(const QPointF &dpi);
     void setDpiFromWidget(QWidget *widget);
@@ -121,7 +121,7 @@ public:
     void pushSegment(ScrollType type, qreal deltaTime, qreal stopProgress, qreal startPos, qreal deltaPos, qreal stopPos, QEasingCurve::Type curve, Qt::Orientation orientation);
     void recalcScrollingSegments(bool forceRecalc = false);
     qreal scrollingSegmentsEndPos(Qt::Orientation orientation) const;
-    bool scrollingSegmentsValid(Qt::Orientation orientation);
+    bool scrollingSegmentsValid(Qt::Orientation orientation) const;
     void createScrollToSegments(qreal v, qreal deltaTime, qreal endPos, Qt::Orientation orientation, ScrollType type);
     void createScrollingSegments(qreal v, qreal startPos,
                                  qreal deltaTime, qreal deltaPos,
@@ -131,7 +131,7 @@ public:
     void setContentPositionHelperDragging(const QPointF &deltaPos);
     void setContentPositionHelperScrolling();
 
-    qreal nextSnapPos(qreal p, int dir, Qt::Orientation orientation);
+    qreal nextSnapPos(qreal p, int dir, Qt::Orientation orientation) const;
     static qreal nextSegmentPosition(QQueue<ScrollSegment> &segments, qint64 now, qreal oldPos);
 
     inline int frameRateSkip() const { return properties.d.data()->frameRate; }