diff --git a/kolourpaint.cpp b/kolourpaint.cpp
--- a/kolourpaint.cpp
+++ b/kolourpaint.cpp
@@ -85,7 +85,7 @@
 
   QCommandLineParser cmdLine;
   KAboutData::setApplicationData(aboutData);
-  QApplication::setWindowIcon(QIcon::fromTheme(QStringLiteral("kolourpaint"), app.windowIcon()));
+  QApplication::setWindowIcon(QIcon::fromTheme(QStringLiteral("kolourpaint"), QApplication::windowIcon()));
   cmdLine.addVersionOption();
   cmdLine.addHelpOption();
   cmdLine.addPositionalArgument(QStringLiteral("files"), i18n("Image files to open, optionally"), QStringLiteral("[files...]"));
@@ -120,5 +120,5 @@
     }
   }
 
-  return app.exec();
+  return QApplication::exec();
 }