diff --git a/pep-0001.txt b/pep-0001.txt
index 40fb3ea5a..74748186b 100644
--- a/pep-0001.txt
+++ b/pep-0001.txt
@@ -128,8 +128,9 @@ What belongs in a successful PEP?
     Each PEP should have the following parts:
 
     1. Preamble -- RFC822 style headers containing meta-data about the
-       PEP, including the PEP number, a short descriptive title, the
-       names contact info for each author, etc.
+       PEP, including the PEP number, a short descriptive title
+       (limited to a maximum of 38 characters), the names contact info
+       for each author, etc.
 
     2. Abstract -- a short (~200 word) description of the technical
        issue being addressed.