diff --git a/examples/corelib/serialization/convert/converter.h b/examples/corelib/serialization/convert/converter.h
index 56b501a076b..9be81820dba 100644
--- a/examples/corelib/serialization/convert/converter.h
+++ b/examples/corelib/serialization/convert/converter.h
@@ -54,6 +54,7 @@
 #include <QIODevice>
 #include <QPair>
 #include <QVariant>
+#include <QVariantMap>
 #include <QList>
 
 class VariantOrderedMap : public QList<QPair<QVariant, QVariant>>
diff --git a/examples/opengl/contextinfo/widget.cpp b/examples/opengl/contextinfo/widget.cpp
index df1e6a6f7b9..9ff7b8b1d6f 100644
--- a/examples/opengl/contextinfo/widget.cpp
+++ b/examples/opengl/contextinfo/widget.cpp
@@ -57,6 +57,8 @@
 #include <QCheckBox>
 #include <QHBoxLayout>
 #include <QLabel>
+#include <QList>
+#include <QByteArray>
 #include <QPushButton>
 #include <QTextEdit>
 #include <QSplitter>
diff --git a/examples/widgets/mainwindows/mainwindow/mainwindow.h b/examples/widgets/mainwindows/mainwindow/mainwindow.h
index 3ce9732763f..b889b875b41 100644
--- a/examples/widgets/mainwindows/mainwindow/mainwindow.h
+++ b/examples/widgets/mainwindows/mainwindow/mainwindow.h
@@ -52,6 +52,9 @@
 #define MAINWINDOW_H
 
 #include <QMainWindow>
+#include <QMap>
+#include <QString>
+#include <QSize>
 
 class ToolBar;
 QT_FORWARD_DECLARE_CLASS(QMenu)
diff --git a/examples/widgets/painting/fontsampler/mainwindow.h b/examples/widgets/painting/fontsampler/mainwindow.h
index 34e54440d4d..a4b1d375db5 100644
--- a/examples/widgets/painting/fontsampler/mainwindow.h
+++ b/examples/widgets/painting/fontsampler/mainwindow.h
@@ -56,6 +56,11 @@
 #if defined(QT_PRINTSUPPORT_LIB)
 #include <QtPrintSupport/qtprintsupportglobal.h>
 #endif
+
+#include <QList>
+#include <QMap>
+#include <QString>
+
 QT_BEGIN_NAMESPACE
 class QPrinter;
 class QTextEdit;