diff --git a/src/Gui/ViewProviderFeaturePython.cpp b/src/Gui/ViewProviderFeaturePython.cpp
index 6e84997913..8996bfe23c 100644
--- a/src/Gui/ViewProviderFeaturePython.cpp
+++ b/src/Gui/ViewProviderFeaturePython.cpp
@@ -638,6 +638,38 @@ void ViewProviderFeaturePythonImp::onChanged(const App::Property* prop)
     }
 }
 
+void ViewProviderFeaturePythonImp::onBeforeChange(const App::Property* prop)
+{
+    if(py_onBeforeChange.isNone())
+        return;
+
+    // Run the onChanged method of the proxy object.
+    Base::PyGILStateLocker lock;
+    try {
+        if (has__object__) {
+            Py::Tuple args(1);
+            const char* prop_name = object->getPropertyName(prop);
+            if (prop_name) {
+                args.setItem(0, Py::String(prop_name));
+                Base::pyCall(py_onBeforeChange.ptr(),args.ptr());
+            }
+        }
+        else {
+            Py::Tuple args(2);
+            args.setItem(0, Py::Object(object->getPyObject(), true));
+            const char* prop_name = object->getPropertyName(prop);
+            if (prop_name) {
+                args.setItem(1, Py::String(prop_name));
+                Base::pyCall(py_onBeforeChange.ptr(),args.ptr());
+            }
+        }
+    }
+    catch (Py::Exception&) {
+        Base::PyException e; // extract the Python error text
+        e.ReportException();
+    }
+}
+
 void ViewProviderFeaturePythonImp::startRestoring()
 {
 }
diff --git a/src/Gui/ViewProviderFeaturePython.h b/src/Gui/ViewProviderFeaturePython.h
index 4133022050..023247019e 100644
--- a/src/Gui/ViewProviderFeaturePython.h
+++ b/src/Gui/ViewProviderFeaturePython.h
@@ -72,6 +72,7 @@ public:
     void attach(App::DocumentObject *pcObject);
     void updateData(const App::Property*);
     void onChanged(const App::Property* prop);
+    void onBeforeChange(const App::Property* prop);
     void startRestoring();
     void finishRestoring();
     ValueT onDelete(const std::vector<std::string> & sub);
@@ -149,6 +150,7 @@ private:
     FC_PY_ELEMENT(attach) \
     FC_PY_ELEMENT(updateData) \
     FC_PY_ELEMENT(onChanged) \
+    FC_PY_ELEMENT(onBeforeChange) \
     FC_PY_ELEMENT(startRestoring) \
     FC_PY_ELEMENT(finishRestoring) \
     FC_PY_ELEMENT(onDelete) \
@@ -518,6 +520,11 @@ protected:
         imp->onChanged(prop);
         ViewProviderT::onChanged(prop);
     }
+    void onBeforeChange(const App::Property* prop) override
+    {
+        imp->onBeforeChange(prop);
+        ViewProviderT::onBeforeChange(prop);
+    }
     /// is called by the document when the provider goes in edit mode
     bool setEdit(int ModNum) override
     {