diff --git a/src/Gui/StartupProcess.cpp b/src/Gui/StartupProcess.cpp
index 0e9b23e327..9c5e7e571b 100644
--- a/src/Gui/StartupProcess.cpp
+++ b/src/Gui/StartupProcess.cpp
@@ -451,9 +451,6 @@ void StartupPostProcess::showMainWindow()
 
 void StartupPostProcess::activateWorkbench()
 {
-    // Always activate the material workbench
-     guiApp.activateWorkbench("MaterialWorkbench");
-
     // Activate the correct workbench
     std::string start = App::Application::Config()["StartWorkbench"];
     Base::Console().Log("Init: Activating default workbench %s\n", start.c_str());
diff --git a/src/Mod/Part/App/AppPart.cpp b/src/Mod/Part/App/AppPart.cpp
index cce743971c..62b29c7b0e 100644
--- a/src/Mod/Part/App/AppPart.cpp
+++ b/src/Mod/Part/App/AppPart.cpp
@@ -200,6 +200,14 @@ PyObject* Part::PartExceptionOCCDimensionError;
 
 PyMOD_INIT_FUNC(Part)
 {
+    // load dependent module
+    try {
+        Base::Interpreter().runString("import Materials");
+    }
+    catch(const Base::Exception& e) {
+        PyErr_SetString(PyExc_ImportError, e.what());
+        PyMOD_Return(nullptr);
+    }
     Base::Console().Log("Module: Part\n");
 
     // This is highly experimental and we should keep an eye on it
diff --git a/src/Mod/Part/Gui/AppPartGui.cpp b/src/Mod/Part/Gui/AppPartGui.cpp
index 9de0d18578..a224a3806d 100644
--- a/src/Mod/Part/Gui/AppPartGui.cpp
+++ b/src/Mod/Part/Gui/AppPartGui.cpp
@@ -123,6 +123,7 @@ PyMOD_INIT_FUNC(PartGui)
     // load needed modules
     try {
         Base::Interpreter().runString("import Part");
+        Base::Interpreter().runString("import MatGui");
     }
     catch(const Base::Exception& e) {
         PyErr_SetString(PyExc_ImportError, e.what());