Initialize structseq types only once.
diff --git a/Modules/timemodule.c b/Modules/timemodule.c
index 7f762f3..08d28a1 100644
--- a/Modules/timemodule.c
+++ b/Modules/timemodule.c
@@ -228,6 +228,7 @@
 	9,
 };
 
+static int initialized;
 static PyTypeObject StructTimeType;
 
 static PyObject *
@@ -807,9 +808,13 @@
 	hInterruptEvent = CreateEvent(NULL, TRUE, FALSE, NULL);
 	SetConsoleCtrlHandler( PyCtrlHandler, TRUE);
 #endif /* MS_WINDOWS */
-        PyStructSequence_InitType(&StructTimeType, &struct_time_type_desc);
+	if (!initialized) {
+		PyStructSequence_InitType(&StructTimeType, 
+					  &struct_time_type_desc);
+	}
 	Py_INCREF(&StructTimeType);
 	PyModule_AddObject(m, "struct_time", (PyObject*) &StructTimeType);
+	initialized = 1;
 }