diff --git a/examples/painting/composition/main.cpp b/examples/painting/composition/main.cpp
index d6bc170a97..3c6a16aaf5 100644
--- a/examples/painting/composition/main.cpp
+++ b/examples/painting/composition/main.cpp
@@ -50,9 +50,6 @@ int main(int argc, char **argv)
 {
  //   Q_INIT_RESOURCE(deform);
 
-#ifdef QT_OPENGL_SUPPORT
-    QGL::setPreferredPaintEngine(QPaintEngine::OpenGL);
-#endif
     QApplication app(argc, argv);
 
     CompositionWidget compWidget(0);
diff --git a/src/opengl/qgl.h b/src/opengl/qgl.h
index 3446e29029..c25ea16e43 100644
--- a/src/opengl/qgl.h
+++ b/src/opengl/qgl.h
@@ -101,8 +101,6 @@ class QGLContextPrivate;
 // Namespace class:
 namespace QGL
 {
-    Q_OPENGL_EXPORT void setPreferredPaintEngine(QPaintEngine::Type engineType);
-
     enum FormatOption {
         DoubleBuffer            = 0x0001,
         DepthBuffer             = 0x0002,