diff --git a/src/Mod/Assembly/App/AppAssembly.cpp b/src/Mod/Assembly/App/AppAssembly.cpp
index 89292fd4a5..27a1b7f13a 100644
--- a/src/Mod/Assembly/App/AppAssembly.cpp
+++ b/src/Mod/Assembly/App/AppAssembly.cpp
@@ -57,7 +57,16 @@ void AssemblyExport initAssembly()
         PyErr_SetString(PyExc_ImportError, e.what());
         return;
     }
+#if PY_MAJOR_VERSION >= 3
+    static struct PyModuleDef AssemblyAPIDef = {
+        PyModuleDef_HEAD_INIT,
+        "Assembly", module_Assembly_doc, -1, Assembly_methods,
+        NULL, NULL, NULL, NULL
+    };
+    PyModule_Create(&AssemblyAPIDef);
+#else
     Py_InitModule3("Assembly", Assembly_methods, module_Assembly_doc);   /* mod name, table ptr */
+#endif
     Base::Console().Log("Loading Assembly module... done\n");
 
 
diff --git a/src/Mod/Assembly/Gui/AppAssemblyGui.cpp b/src/Mod/Assembly/Gui/AppAssemblyGui.cpp
index ed223f8c35..b671bb18fb 100644
--- a/src/Mod/Assembly/Gui/AppAssemblyGui.cpp
+++ b/src/Mod/Assembly/Gui/AppAssemblyGui.cpp
@@ -68,7 +68,16 @@ void AssemblyGuiExport initAssemblyGui()
         return;
     }
 
+#if PY_MAJOR_VERSION >= 3
+    static struct PyModuleDef AssemblyGuiAPIDef = {
+        PyModuleDef_HEAD_INIT,
+        "AssemblyGui", 0, -1, AssemblyGui_Import_methods,
+        NULL, NULL, NULL, NULL
+    };
+    PyModule_Create(&AssemblyGuiAPIDef);
+#else
     (void) Py_InitModule("AssemblyGui", AssemblyGui_Import_methods);   /* mod name, table ptr */
+#endif
     Base::Console().Log("Loading GUI of Assembly module... done\n");
 
     // directly load the module for usage in commands