diff --git a/src/Base/PyObjectBase.h b/src/Base/PyObjectBase.h
index 1b9ae3fc0..1ae0a52d8 100644
--- a/src/Base/PyObjectBase.h
+++ b/src/Base/PyObjectBase.h
@@ -84,6 +84,21 @@
  */
 #define PYFUNCIMP_S(CLASS,SFUNC) PyObject* CLASS::SFUNC (PyObject *self,PyObject *args,PyObject *kwd)
 
+
+/** Macro for initialization function of Python modules. 
+ */
+#if PY_MAJOR_VERSION >= 3
+# define PyMOD_INIT_FUNC(name) PyMODINIT_FUNC PyInit_##name(void)
+#else
+# define PyMOD_INIT_FUNC(name) PyMODINIT_FUNC init##name(void)
+#endif
+
+#if PY_MAJOR_VERSION >= 3
+# define PyMOD_Return(name) return name
+#else
+# define PyMOD_Return(name) return
+#endif
+
 /**
  * Union to convert from PyTypeObject to PyObject pointer.
  */
diff --git a/src/Mod/Complete/App/AppComplete.cpp b/src/Mod/Complete/App/AppComplete.cpp
index 5c202fc90..4d5a45e6e 100644
--- a/src/Mod/Complete/App/AppComplete.cpp
+++ b/src/Mod/Complete/App/AppComplete.cpp
@@ -30,6 +30,7 @@
 #include <CXX/Objects.hxx>
 
 #include <Base/Console.h>
+#include <Base/PyObjectBase.h>
 #include <Base/Interpreter.h>
 
 #include "CompleteConfiguration.h"
@@ -57,7 +58,7 @@ PyObject* initModule()
 
 
 /* Python entry */
-PyMODINIT_FUNC initComplete()
+PyMOD_INIT_FUNC(Complete)
 {
     // load dependent module
     try {
@@ -86,8 +87,9 @@ PyMODINIT_FUNC initComplete()
     }
     catch(const Base::Exception& e) {
         PyErr_SetString(PyExc_ImportError, e.what());
-        return;
+        PyMOD_Return(0);
     }
-    (void)Complete::initModule();
+    PyObject* mod = Complete::initModule();
     Base::Console().Log("Loading Complete module... done\n");
+    PyMOD_Return(mod);
 }
diff --git a/src/Mod/Complete/Gui/AppCompleteGui.cpp b/src/Mod/Complete/Gui/AppCompleteGui.cpp
index 6709afeaa..09505603f 100644
--- a/src/Mod/Complete/Gui/AppCompleteGui.cpp
+++ b/src/Mod/Complete/Gui/AppCompleteGui.cpp
@@ -74,32 +74,32 @@ PyObject* initModule()
 
 
 /* Python entry */
-PyMODINIT_FUNC initCompleteGui()
+PyMOD_INIT_FUNC(CompleteGui)
 {
     if (!Gui::Application::Instance) {
         PyErr_SetString(PyExc_ImportError, "Cannot load Gui module in console application.");
-        return;
+        PyMOD_Return(0);
     }
 
-    // try to load dependent modules, currently not (AssemblyGui, CamGui)
-    char *modules[] = {"PartGui", "MeshGui", "MeshPartGui", "PointsGui", "DrawingGui", "RaytracingGui", "SketcherGui", "PartDesignGui", "ImageGui", "TestGui"};
-    size_t nModules = sizeof(modules) / sizeof(char*);
-    for (size_t i = 0; i < nModules; i++) {
-        try {
-            Base::Interpreter().loadModule(modules[i]);
-        }
-        catch (const Base::Exception& e) {
-            Base::Console().Error("%s\n", e.what());
-            // Prints message to console window if we are in interactive mode
-            PyErr_Print();
-            continue;
-        }
-        mods.append(QSTRING(modules[i]));
-    }
-
-#   ifdef COMPLETE_USE_DRAFTING
-    mods.append(QSTRING("DraftGui"));
-    try {
+    // try to load dependent modules, currently not (AssemblyGui, CamGui)
+    char *modules[] = {"PartGui", "MeshGui", "MeshPartGui", "PointsGui", "DrawingGui", "RaytracingGui", "SketcherGui", "PartDesignGui", "ImageGui", "TestGui"};
+    size_t nModules = sizeof(modules) / sizeof(char*);
+    for (size_t i = 0; i < nModules; i++) {
+        try {
+            Base::Interpreter().loadModule(modules[i]);
+        }
+        catch (const Base::Exception& e) {
+            Base::Console().Error("%s\n", e.what());
+            // Prints message to console window if we are in interactive mode
+            PyErr_Print();
+            continue;
+        }
+        mods.append(QSTRING(modules[i]));
+    }
+
+#   ifdef COMPLETE_USE_DRAFTING
+    mods.append(QSTRING("DraftGui"));
+    try {
         Py::Module module(PyImport_ImportModule("FreeCADGui"),true);
         Py::Callable method(module.getAttr(std::string("getWorkbench")));
 
@@ -128,15 +128,15 @@ PyMODINIT_FUNC initCompleteGui()
         // Get the CompleteWorkbench handler
         args.setItem(0,Py::String("CompleteWorkbench"));
     }
-    catch (const Base::Exception& e) {
-        Base::Console().Error("%s\n", e.what());
-        mods.removeAt(mods.size());
-        // Prints message to console window if we are in interactive mode
-        PyErr_Print();
-    }
-#   endif
+    catch (const Base::Exception& e) {
+        Base::Console().Error("%s\n", e.what());
+        mods.removeAt(mods.size());
+        // Prints message to console window if we are in interactive mode
+        PyErr_Print();
+    }
+#   endif
 
-    (void) CompleteGui::initModule();
+    PyObject* mod = CompleteGui::initModule();
     Base::Console().Log("Loading GUI of Complete module... done\n");
 
     // instantiating the commands
@@ -145,4 +145,6 @@ PyMODINIT_FUNC initCompleteGui()
 
      // add resources and reloads the translators
     loadCompleteResource();
+
+    PyMOD_Return(mod);
 }