2 files changed, 8 insertions, 5 deletions
diff --git a/examples/opengl/hellogl_es2/glwidget.cpp b/examples/opengl/hellogl_es2/glwidget.cpp
index 7267cfd124..733475d321 100644
--- a/examples/opengl/hellogl_es2/glwidget.cpp
+++ b/examples/opengl/hellogl_es2/glwidget.cpp
@@ -171,6 +171,8 @@ void GLWidget::paintTexturedCube()
 
 void GLWidget::initializeGL ()
 {
+    initializeOpenGLFunctions();
+
     glClearColor(0.1f, 0.1f, 0.2f, 1.0f);
 
     glGenTextures(1, &m_uiTexture);
diff --git a/examples/opengl/hellogl_es2/glwidget.h b/examples/opengl/hellogl_es2/glwidget.h
index 8ed86b1e01..00073aa047 100644
--- a/examples/opengl/hellogl_es2/glwidget.h
+++ b/examples/opengl/hellogl_es2/glwidget.h
@@ -42,15 +42,16 @@
 #define GLWIDGET_H
 
 #include <QGLWidget>
-#include <QtGui/qvector3d.h>
-#include <QtGui/qmatrix4x4.h>
-#include <QtOpenGL/qglshaderprogram.h>
+#include <QOpenGLFunctions>
+#include <QGLShaderProgram>
+#include <QVector3D>
+#include <QMatrix4x4>
 #include <QTime>
 #include <QVector>
 
 class Bubble;
-class GLWidget : public QGLWidget {
-
+class GLWidget : public QGLWidget, protected QOpenGLFunctions
+{
     Q_OBJECT
 public:
     GLWidget(QWidget *parent = 0);