diff --git a/Modules/itertoolsmodule.c b/Modules/itertoolsmodule.c
index 0dd31dfbc5a346..b724868552df26 100644
--- a/Modules/itertoolsmodule.c
+++ b/Modules/itertoolsmodule.c
@@ -289,7 +289,7 @@ itertools.pairwise.__new__ as pairwise_new
     /
 Return an iterator of overlapping pairs taken from the input iterator.
 
-    s -> (s0,s1), (s1,s2), (s2, s3), ...
+    s -> (s0,s1), (s1,s2), (s2,s3), ...
 
 [clinic start generated code]*/