diff --git a/Source/QtDialog/CMakeSetup.cxx b/Source/QtDialog/CMakeSetup.cxx
index 9f881e24eb..ca0b015d51 100644
--- a/Source/QtDialog/CMakeSetup.cxx
+++ b/Source/QtDialog/CMakeSetup.cxx
@@ -92,6 +92,10 @@ int main(int argc, char** argv)
   cmAddPluginPath();
 #endif
 
+#if QT_VERSION >= 0x050600
+  QGuiApplication::setAttribute(Qt::AA_EnableHighDpiScaling);
+#endif
+
   QApplication app(argc, argv);
 
   setlocale(LC_NUMERIC, "C");