diff --git a/pep-0378.txt b/pep-0378.txt
index 2e498fe07..9bddbbe47 100644
--- a/pep-0378.txt
+++ b/pep-0378.txt
@@ -81,8 +81,9 @@ length including the thousands separators and decimal separators.
 No change is proposed for the locale module.
 
 The thousands separator is defined as shown above for types
-'d', 'e', 'f', 'g', 'E', 'G'and 'F'. To allow future extensions, it is
-undefined for other types: binary, octal, hex, character, etc.
+'d', 'e', 'f', 'g', '%', 'E', 'G' and 'F'. To allow future
+extensions, it is undefined for other types: binary, octal,
+hex, character, etc.
 
 
 Current Version of the Mini-Language
@@ -173,7 +174,7 @@ and decimal point::
   format(1234.5, "08,.1f") -->    '01,234.5'
 
 The ',' option is defined as shown above for types 'd', 'e',
-'f', 'g', 'E', 'G'and 'F'. To allow future extensions, it is
+'f', 'g', 'E', 'G', '%' and 'F'. To allow future extensions, it is
 undefined for other types: binary, octal, hex, character,
 etc.