diff --git a/Lib/_pydatetime.py b/Lib/_pydatetime.py
index f11eaa50e016e9..cfcd35827a275a 100644
--- a/Lib/_pydatetime.py
+++ b/Lib/_pydatetime.py
@@ -2139,7 +2139,7 @@ def isoformat(self, sep='T', timespec='auto'):
         By default, the fractional part is omitted if self.microsecond == 0.
 
         If self.tzinfo is not None, the UTC offset is also attached, giving
-        giving a full format of 'YYYY-MM-DD HH:MM:SS.mmmmmm+HH:MM'.
+        a full format of 'YYYY-MM-DD HH:MM:SS.mmmmmm+HH:MM'.
 
         Optional argument sep specifies the separator between date and
         time, default 'T'.