diff --git a/src/gui/kernel/qevent.cpp b/src/gui/kernel/qevent.cpp
index c459ca3b6a6..ff67d64cd3d 100644
--- a/src/gui/kernel/qevent.cpp
+++ b/src/gui/kernel/qevent.cpp
@@ -61,6 +61,10 @@
 
 QT_BEGIN_NAMESPACE
 
+static_assert(sizeof(QMutableTouchEvent) == sizeof(QTouchEvent));
+static_assert(sizeof(QMutableSinglePointEvent) == sizeof(QSinglePointEvent));
+static_assert(sizeof(QMouseEvent) == sizeof(QSinglePointEvent));
+
 /*!
     \class QEnterEvent
     \ingroup events
diff --git a/src/gui/kernel/qevent_p.h b/src/gui/kernel/qevent_p.h
index a776b957a56..227b1a43033 100644
--- a/src/gui/kernel/qevent_p.h
+++ b/src/gui/kernel/qevent_p.h
@@ -79,8 +79,6 @@ public:
     void addPoint(const QEventPoint &point);
 };
 
-static_assert(sizeof(QMutableTouchEvent) == sizeof(QTouchEvent));
-
 class Q_GUI_EXPORT QMutableSinglePointEvent : public QSinglePointEvent
 {
 public:
@@ -104,8 +102,6 @@ public:
     void setDoubleClick(bool d = true) { m_doubleClick = d; }
 };
 
-static_assert(sizeof(QMutableSinglePointEvent) == sizeof(QSinglePointEvent));
-
 QT_END_NAMESPACE
 
 #endif // QEVENT_P_H