4 files changed, 6 insertions, 11 deletions
diff --git a/examples/widgets/widgets/tetrix/main.cpp b/examples/widgets/widgets/tetrix/main.cpp
index 2698190e76..92f245ca14 100644
--- a/examples/widgets/widgets/tetrix/main.cpp
+++ b/examples/widgets/widgets/tetrix/main.cpp
@@ -48,12 +48,10 @@
 **
 ****************************************************************************/
 
-#include <QtWidgets>
-
-#include <stdlib.h>
-
 #include "tetrixwindow.h"
 
+#include <QApplication>
+
 int main(int argc, char *argv[])
 {
     QApplication app(argc, argv);
diff --git a/examples/widgets/widgets/tetrix/tetrixboard.cpp b/examples/widgets/widgets/tetrix/tetrixboard.cpp
index 222ab1fb4d..b1139ca8a6 100644
--- a/examples/widgets/widgets/tetrix/tetrixboard.cpp
+++ b/examples/widgets/widgets/tetrix/tetrixboard.cpp
@@ -48,10 +48,10 @@
 **
 ****************************************************************************/
 
-#include <QtWidgets>
-
 #include "tetrixboard.h"
 
+#include <QtWidgets>
+
 //! [0]
 TetrixBoard::TetrixBoard(QWidget *parent)
     : QFrame(parent)
diff --git a/examples/widgets/widgets/tetrix/tetrixpiece.cpp b/examples/widgets/widgets/tetrix/tetrixpiece.cpp
index 3d8fa86860..b1b3ca9a99 100644
--- a/examples/widgets/widgets/tetrix/tetrixpiece.cpp
+++ b/examples/widgets/widgets/tetrix/tetrixpiece.cpp
@@ -48,12 +48,10 @@
 **
 ****************************************************************************/
 
-#include <QtCore>
-
-#include <stdlib.h>
-
 #include "tetrixpiece.h"
 
+#include <QtCore>
+
 //! [0]
 void TetrixPiece::setRandomShape()
 {
diff --git a/examples/widgets/widgets/tetrix/tetrixwindow.h b/examples/widgets/widgets/tetrix/tetrixwindow.h
index 02226ffe1c..3743d6cd2a 100644
--- a/examples/widgets/widgets/tetrix/tetrixwindow.h
+++ b/examples/widgets/widgets/tetrix/tetrixwindow.h
@@ -51,7 +51,6 @@
 #ifndef TETRIXWINDOW_H
 #define TETRIXWINDOW_H
 
-#include <QFrame>
 #include <QWidget>
 
 QT_BEGIN_NAMESPACE