diff --git a/man/man2/intro.2 b/man/man2/intro.2
index f9cbeb588..ad62b9c7d 100644
--- a/man/man2/intro.2
+++ b/man/man2/intro.2
@@ -231,6 +231,7 @@ was supplied to a remove directory or rename call.
 A path name lookup involved too many symbolic links.
 .en 41 ERESTART "Device driver restarted
 .en 43 EIDRM "Identifier removed
+.en 44 EILSEQ "Illegal byte sequence
 .en 50 EPACKSIZE "Invalid packet size
 .en 51 ENOBUFS "Not enough buffers left
 .en 52 EBADIOCTL "Illegal ioctl for device