Index: qt-everywhere-opensource-src-4.8.3/tools/assistant/tools/assistant/mainwindow.cpp
===================================================================
--- qt-everywhere-opensource-src-4.8.3.orig/tools/assistant/tools/assistant/mainwindow.cpp
+++ qt-everywhere-opensource-src-4.8.3/tools/assistant/tools/assistant/mainwindow.cpp
@@ -945,8 +945,7 @@ void MainWindow::updateApplicationFont()
     if (helpEngine.usesAppFont())
         font = helpEngine.appFont();
 
-    const QWidgetList &widgets = qApp->allWidgets();
-    foreach (QWidget* widget, widgets)
+    foreach (QWidget* widget, QApplication::allWidgets())
         widget->setFont(font);
 }