diff --git a/src/Mod/Part/Gui/AppPartGui.cpp b/src/Mod/Part/Gui/AppPartGui.cpp
index c3520182fa..cfec84c3ad 100644
--- a/src/Mod/Part/Gui/AppPartGui.cpp
+++ b/src/Mod/Part/Gui/AppPartGui.cpp
@@ -156,6 +156,7 @@ PyMOD_INIT_FUNC(PartGui)
     PartGui::ViewProviderAttachExtension            ::init();
     PartGui::ViewProviderAttachExtensionPython      ::init();
     PartGui::ViewProviderSplineExtension            ::init();
+    PartGui::ViewProviderSplineExtensionPython      ::init();
     PartGui::ViewProviderPartExt                    ::init();
     PartGui::ViewProviderPart                       ::init();
     PartGui::ViewProviderPrimitive                  ::init();
diff --git a/src/Mod/Part/Gui/ViewProviderHelixParametric.cpp b/src/Mod/Part/Gui/ViewProviderHelixParametric.cpp
index 27ba43e480..3f39353cab 100644
--- a/src/Mod/Part/Gui/ViewProviderHelixParametric.cpp
+++ b/src/Mod/Part/Gui/ViewProviderHelixParametric.cpp
@@ -60,7 +60,6 @@ std::vector<std::string> ViewProviderHelixParametric::getDisplayModes(void) cons
 void ViewProviderHelixParametric::setupContextMenu(QMenu* menu, QObject* receiver, const char* member)
 {
     ViewProviderPrimitive::setupContextMenu(menu, receiver, member);
-    extension.setupContextMenu(menu);
 }
 
 // ------------------------------------------------------------------
@@ -92,5 +91,4 @@ std::vector<std::string> ViewProviderSpiralParametric::getDisplayModes(void) con
 void ViewProviderSpiralParametric::setupContextMenu(QMenu* menu, QObject* receiver, const char* member)
 {
     ViewProviderPrimitive::setupContextMenu(menu, receiver, member);
-    extension.setupContextMenu(menu);
 }
diff --git a/src/Mod/Part/Gui/ViewProviderSpline.cpp b/src/Mod/Part/Gui/ViewProviderSpline.cpp
index 16dcb66ae0..8bcaaad38f 100644
--- a/src/Mod/Part/Gui/ViewProviderSpline.cpp
+++ b/src/Mod/Part/Gui/ViewProviderSpline.cpp
@@ -324,7 +324,7 @@ void ViewProviderSplineExtension::toggleControlPoints(bool on)
     ControlPoints.setValue(on);
 }
 
-void ViewProviderSplineExtension::setupContextMenu(QMenu* menu)
+void ViewProviderSplineExtension::extensionSetupContextMenu(QMenu* menu, QObject*, const char*)
 {
     // toggle command to display components
     Gui::ActionFunction* func = new Gui::ActionFunction(menu);
@@ -546,3 +546,10 @@ void ViewProviderSplineExtension::showControlPointsOfFace(const TopoDS_Face& fac
 
     pcControlPoints->addChild(nodes);
 }
+
+namespace Gui {
+    EXTENSION_PROPERTY_SOURCE_TEMPLATE(PartGui::ViewProviderSplineExtensionPython, PartGui::ViewProviderSplineExtension)
+
+// explicit template instantiation
+    template class PartGuiExport ViewProviderExtensionPythonT<PartGui::ViewProviderSplineExtension>;
+}
diff --git a/src/Mod/Part/Gui/ViewProviderSpline.h b/src/Mod/Part/Gui/ViewProviderSpline.h
index 11195c78bb..6861a2cdfe 100644
--- a/src/Mod/Part/Gui/ViewProviderSpline.h
+++ b/src/Mod/Part/Gui/ViewProviderSpline.h
@@ -68,7 +68,7 @@ public:
     App::PropertyBool ControlPoints;
 
     virtual void extensionUpdateData(const App::Property*) override;
-    void setupContextMenu(QMenu* menu);
+    virtual void extensionSetupContextMenu(QMenu*, QObject*, const char*) override;
 
 protected:
     virtual void extensionOnChanged(const App::Property* p) override;
@@ -80,6 +80,8 @@ protected:
     SoSwitch     *pcControlPoints;
 };
 
+typedef Gui::ViewProviderExtensionPythonT<PartGui::ViewProviderSplineExtension> ViewProviderSplineExtensionPython;
+
 } //namespace PartGui