diff --git a/examples/simplegui.cxx b/examples/simplegui.cxx
index 38f48ae..78f8dae 100644
--- a/examples/simplegui.cxx
+++ b/examples/simplegui.cxx
@@ -5,6 +5,7 @@
 //       1         2         3         4         5         6         7         8
 // 45678901234567890123456789012345678901234567890123456789012345678901234567890
 
+#include <QtCore/QtGlobal>
 #if QT_VERSION >= 0x050000
 #include <QtWidgets/QApplication>
 #else