diff --git a/PROTOCOL b/PROTOCOL

index 131adfe..c828087 100644

--- a/PROTOCOL

+++ b/PROTOCOL

@@ -328,6 +328,11 @@ a server may offer multiple keys of the same type for a period (to

 give clients an opportunity to learn them using this extension) before

 removing the deprecated key from those offered.

+2.6. connection: add IUTF8 terminal mode flag

+

+OpenSSH supports the IUTF8 terminal mode flag and encodes it in "pty-req"

+messages as opcode value 42.

+

 3. SFTP protocol changes

 3.1. sftp: Reversal of arguments to SSH_FXP_SYMLINK

diff --git a/ttymodes.h b/ttymodes.h

index 4d848fe..396ae88 100644

--- a/ttymodes.h

+++ b/ttymodes.h

@@ -127,6 +127,9 @@ TTYMODE(IXOFF,	c_iflag, 40)

 #ifdef IMAXBEL

 TTYMODE(IMAXBEL,c_iflag, 41)

 #endif /* IMAXBEL */

+#ifdef IUTF8

+TTYMODE(IUTF8,	c_iflag, 42)

+#endif /* IUTF8 */

 TTYMODE(ISIG,	c_lflag, 50)

 TTYMODE(ICANON,	c_lflag, 51)