diff --git a/src/gui/kernel/qevent.cpp b/src/gui/kernel/qevent.cpp
index d219aa94a3..2e2e6b8301 100644
--- a/src/gui/kernel/qevent.cpp
+++ b/src/gui/kernel/qevent.cpp
@@ -960,6 +960,43 @@ QWheelEvent::QWheelEvent(const QPointF &pos, const QPointF& globalPos,
       invertedScrolling(inverted)
 {}
 
+/*!
+    Constructs a wheel event object.
+
+    The \a pos provides the location of the mouse cursor
+    within the window. The position in global coordinates is specified
+    by \a globalPos.
+
+    \a pixelDelta contains the scrolling distance in pixels on screen, while
+    \a angleDelta contains the wheel rotation distance. \a pixelDelta is
+    optional and can be null.
+
+    The mouse and keyboard states at the time of the event are specified by
+    \a buttons and \a modifiers.
+
+    The scrolling phase of the event is specified by \a phase.
+
+    If the wheel event comes from a physical mouse wheel, \a source is set to
+    Qt::MouseEventNotSynthesized. If it comes from a gesture detected by the
+    operating system, or from a non-mouse hardware device, such that \a
+    pixelDelta is directly related to finger movement, \a source is set to
+    Qt::MouseEventSynthesizedBySystem. If it comes from Qt, source would be set
+    to Qt::MouseEventSynthesizedByQt.
+
+    If the system is configured to invert the delta values delivered with the
+    event (such as natural scrolling of the touchpad on macOS), \a inverted
+    should be \c true. Otherwise, \a inverted is \c false
+
+    \sa posF(), globalPosF(), angleDelta(), pixelDelta(), phase()
+*/
+QWheelEvent::QWheelEvent(QPointF pos, QPointF globalPos, QPoint pixelDelta, QPoint angleDelta,
+            Qt::MouseButtons buttons, Qt::KeyboardModifiers modifiers, Qt::ScrollPhase phase,
+            bool inverted, Qt::MouseEventSource source)
+    : QInputEvent(Wheel, modifiers), p(pos), g(globalPos), pixelD(pixelDelta),
+      angleD(angleDelta), mouseState(buttons), ph(phase), src(source),
+      invertedScrolling(inverted)
+{}
+
 #endif // QT_CONFIG(wheelevent)
 
 /*!
diff --git a/src/gui/kernel/qevent.h b/src/gui/kernel/qevent.h
index d95da40368..2a47afaa0b 100644
--- a/src/gui/kernel/qevent.h
+++ b/src/gui/kernel/qevent.h
@@ -193,6 +193,10 @@ public:
     QWheelEvent(const QPointF &pos, const QPointF &globalPos, QPoint pixelDelta, QPoint angleDelta,
                 int qt4Delta, Qt::Orientation qt4Orientation, Qt::MouseButtons buttons,
                 Qt::KeyboardModifiers modifiers, Qt::ScrollPhase phase, Qt::MouseEventSource source, bool inverted);
+
+    QWheelEvent(QPointF pos, QPointF globalPos, QPoint pixelDelta, QPoint angleDelta,
+                Qt::MouseButtons buttons, Qt::KeyboardModifiers modifiers, Qt::ScrollPhase phase,
+                bool inverted, Qt::MouseEventSource source = Qt::MouseEventNotSynthesized);
     ~QWheelEvent();
 
 
@@ -225,8 +229,8 @@ protected:
     QPointF g;
     QPoint pixelD;
     QPoint angleD;
-    int qt4D;
-    Qt::Orientation qt4O;
+    int qt4D = 0;
+    Qt::Orientation qt4O = Qt::Vertical;
     Qt::MouseButtons mouseState;
     uint ph : 2;
     uint src: 2;