diff --git a/pkgs/racket-doc/scribblings/reference/port-lib.scrbl b/pkgs/racket-doc/scribblings/reference/port-lib.scrbl
index dd2e7053c8..fead2b1065 100644
--- a/pkgs/racket-doc/scribblings/reference/port-lib.scrbl
+++ b/pkgs/racket-doc/scribblings/reference/port-lib.scrbl
@@ -311,9 +311,9 @@ the purposes of synchronization) when each port reports being ready.
 However, the first port may stop being ready while waiting on
 the second port to sync, so it cannot be guaranteed that both
 ports are ready at once. Closing the combined port is done
-after writing all remaining bytes to @racket[b-out].}
+after writing all remaining bytes to @racket[b-out].
 
-@history[#:added "7.7.0.9"]
+@history[#:added "7.7.0.10"]}
 
 @defproc[(merge-input [a-in input-port?]
                       [b-in input-port?]