diff --git a/pep-3100.txt b/pep-3100.txt
index 472fc0627..1252858f1 100644
--- a/pep-3100.txt
+++ b/pep-3100.txt
@@ -318,10 +318,10 @@ References
 .. [27] python-3000 email ("sets in P3K?")
    http://mail.python.org/pipermail/python-3000/2006-April/001286.html
 
-   [28] python-3000 email ("sets in P3K?")
+.. [28] python-3000 email ("sets in P3K?")
    http://mail.python.org/pipermail/python-3000/2006-May/001666.html
 
-   [29] python-3000 email ("bug in modulus?")
+.. [29] python-3000 email ("bug in modulus?")
    http://mail.python.org/pipermail/python-3000/2006-May/001735.html
 
 .. [#pep238] PEP 238 (Changing the Division Operator)