diff --git a/examples/widgets/rhi/cuberhiwidget/examplewidget.cpp b/examples/widgets/rhi/cuberhiwidget/examplewidget.cpp
index fe39d904dd..2d16cc0ba2 100644
--- a/examples/widgets/rhi/cuberhiwidget/examplewidget.cpp
+++ b/examples/widgets/rhi/cuberhiwidget/examplewidget.cpp
@@ -3,8 +3,10 @@
 
 #include "examplewidget.h"
 #include "cube.h"
+
 #include <QFile>
 #include <QPainter>
+#include <QtGui/qquaternion.h>
 
 static const QSize CUBE_TEX_SIZE(512, 512);
 
diff --git a/tests/auto/gui/math3d/qmatrixnxn/tst_qmatrixnxn.cpp b/tests/auto/gui/math3d/qmatrixnxn/tst_qmatrixnxn.cpp
index e761f8cb3c..f8a0167efa 100644
--- a/tests/auto/gui/math3d/qmatrixnxn/tst_qmatrixnxn.cpp
+++ b/tests/auto/gui/math3d/qmatrixnxn/tst_qmatrixnxn.cpp
@@ -3,7 +3,9 @@
 
 #include <QTest>
 #include <QtCore/qmath.h>
+
 #include <QtGui/qmatrix4x4.h>
+#include <QtGui/qquaternion.h>
 
 class tst_QMatrixNxN : public QObject
 {
diff --git a/tests/manual/rhi/rhiwidgetproto/examplewidget.cpp b/tests/manual/rhi/rhiwidgetproto/examplewidget.cpp
index 6a6fd5b326..34765c2e78 100644
--- a/tests/manual/rhi/rhiwidgetproto/examplewidget.cpp
+++ b/tests/manual/rhi/rhiwidgetproto/examplewidget.cpp
@@ -3,8 +3,11 @@
 
 #include "examplewidget.h"
 #include "../shared/cube.h"
+
 #include <QFile>
+
 #include <QPainter>
+#include <QtGui/qquaternion.h>
 
 static const QSize CUBE_TEX_SIZE(512, 512);
 
diff --git a/tests/manual/stereographicsview/mygraphicsview.cpp b/tests/manual/stereographicsview/mygraphicsview.cpp
index 933ee00835..5401baf862 100644
--- a/tests/manual/stereographicsview/mygraphicsview.cpp
+++ b/tests/manual/stereographicsview/mygraphicsview.cpp
@@ -2,9 +2,12 @@
 // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
 
 #include "mygraphicsview.h"
+
 #include <QResizeEvent>
 #include <QFileDialog>
 
+#include <QtGui/qquaternion.h>
+
 Q_OPENGL_EXPORT QImage qt_gl_read_framebuffer(const QSize &size, bool alpha_format, bool include_alpha);
 
 MyGraphicsView::MyGraphicsView(QWidget *parent) :