diff --git a/src/Tools/plugins/widget/plugin.cpp b/src/Tools/plugins/widget/plugin.cpp
index 739c3565ab..cce6a5da4c 100644
--- a/src/Tools/plugins/widget/plugin.cpp
+++ b/src/Tools/plugins/widget/plugin.cpp
@@ -1587,4 +1587,6 @@ QList<QDesignerCustomWidgetInterface *> CustomWidgetPlugin::customWidgets () con
 //                         "</widget>\n");
 //}
 
+#if QT_VERSION < 0x050000
 Q_EXPORT_PLUGIN2(containerextension, CustomWidgetPlugin)
+#endif
diff --git a/src/Tools/plugins/widget/plugin.pro b/src/Tools/plugins/widget/plugin.pro
index 9c6fa74aab..f9e1b4e3d5 100644
--- a/src/Tools/plugins/widget/plugin.pro
+++ b/src/Tools/plugins/widget/plugin.pro
@@ -1,7 +1,11 @@
 
 TEMPLATE = lib
 CONFIG += plugin
-QT += designer
+greaterThan(QT_MAJOR_VERSION, 4) {
+  QT += designer
+} else {
+  CONFIG += designer
+}
 TARGET = FreeCAD_widgets
 DEPENDPATH += .
 INCLUDEPATH += .