Fix for #1087741 patch.
diff --git a/Modules/mmapmodule.c b/Modules/mmapmodule.c
index dfbc8fc..09e9465 100644
--- a/Modules/mmapmodule.c
+++ b/Modules/mmapmodule.c
@@ -129,7 +129,7 @@
 	}
 #endif /* UNIX */
 
-	PyObject_Del(m_obj);
+	m_obj->ob_type->tp_free((PyObject*)m_obj);
 }
 
 static PyObject *