Index: Modules/_ctypes/_ctypes.c
===================================================================
--- Modules/_ctypes/_ctypes.c	(revision 74955)
+++ Modules/_ctypes/_ctypes.c	(working copy)
@@ -5521,36 +5521,42 @@
 	Struct_Type.tp_base = &PyCData_Type;
 	if (PyType_Ready(&Struct_Type) < 0)
 		return;
+	Py_INCREF(&Struct_Type);
 	PyModule_AddObject(m, "Structure", (PyObject *)&Struct_Type);
 
 	Py_TYPE(&Union_Type) = &UnionType_Type;
 	Union_Type.tp_base = &PyCData_Type;
 	if (PyType_Ready(&Union_Type) < 0)
 		return;
+	Py_INCREF(&Union_Type);
 	PyModule_AddObject(m, "Union", (PyObject *)&Union_Type);
 
 	Py_TYPE(&PyCPointer_Type) = &PyCPointerType_Type;
 	PyCPointer_Type.tp_base = &PyCData_Type;
 	if (PyType_Ready(&PyCPointer_Type) < 0)
 		return;
+	Py_INCREF(&PyCPointer_Type);
 	PyModule_AddObject(m, "_Pointer", (PyObject *)&PyCPointer_Type);
 
 	Py_TYPE(&PyCArray_Type) = &PyCArrayType_Type;
 	PyCArray_Type.tp_base = &PyCData_Type;
 	if (PyType_Ready(&PyCArray_Type) < 0)
 		return;
+	Py_INCREF(&PyCArray_Type);
 	PyModule_AddObject(m, "Array", (PyObject *)&PyCArray_Type);
 
 	Py_TYPE(&Simple_Type) = &PyCSimpleType_Type;
 	Simple_Type.tp_base = &PyCData_Type;
 	if (PyType_Ready(&Simple_Type) < 0)
 		return;
+	Py_INCREF(&Simple_Type);
 	PyModule_AddObject(m, "_SimpleCData", (PyObject *)&Simple_Type);
 
 	Py_TYPE(&PyCFuncPtr_Type) = &PyCFuncPtrType_Type;
 	PyCFuncPtr_Type.tp_base = &PyCData_Type;
 	if (PyType_Ready(&PyCFuncPtr_Type) < 0)
 		return;
+	Py_INCREF(&PyCFuncPtr_Type);
 	PyModule_AddObject(m, "CFuncPtr", (PyObject *)&PyCFuncPtr_Type);
 
 	/*************************************************