#18437: fix comment typo.
diff --git a/Lib/email/charset.py b/Lib/email/charset.py
index dddaa76..30a13ff 100644
--- a/Lib/email/charset.py
+++ b/Lib/email/charset.py
@@ -183,7 +183,7 @@
                    header encoding.  Charset.SHORTEST is not allowed for
                    body_encoding.
 
-    output_charset: Some character sets must be converted before the can be
+    output_charset: Some character sets must be converted before they can be
                     used in email headers or bodies.  If the input_charset is
                     one of them, this attribute will contain the name of the
                     charset output will be converted to.  Otherwise, it will