diff --git a/examples/simplegui.cxx b/examples/simplegui.cxx
index 7545741..38f48ae 100644
--- a/examples/simplegui.cxx
+++ b/examples/simplegui.cxx
@@ -5,7 +5,11 @@
 //       1         2         3         4         5         6         7         8
 // 45678901234567890123456789012345678901234567890123456789012345678901234567890
 
+#if QT_VERSION >= 0x050000
+#include <QtWidgets/QApplication>
+#else
 #include <QtGui/QApplication>
+#endif
 #include <proxyface/proxy.hxx>
 
 int main(int argc, char** argv) {