diff --git a/Lib/smtplib.py b/Lib/smtplib.py
index bfba5c8..7e984e8 100755
--- a/Lib/smtplib.py
+++ b/Lib/smtplib.py
@@ -168,7 +168,7 @@ def quotedata(data):
     """Quote data for email.
 
     Double leading '.', and change Unix newline '\\n', or Mac '\\r' into
-    Internet CRLF end-of-line.
+    internet CRLF end-of-line.
     """
     return re.sub(r'(?m)^\.', '..',
         re.sub(r'(?:\r\n|\n|\r(?!\n))', CRLF, data))