diff --git a/TODO b/TODO
index 0ba453ed..491ad6eb 100644
--- a/TODO
+++ b/TODO
@@ -1,3 +1,6 @@
+- BUGFIX: Use Py_ssize_t for indizes, according to PEP 353:
+  http://www.python.org/dev/peps/pep-0353/#conversion-guidelines
+
 - [BUG REPORT] the web interface only runs on the server it is installed on.
   The   ALLOWED_HOSTS and ALLOWED_SERVERS variables in lc.cgi don't work and
   are not (well) documented.