1 files changed, 1 insertions, 0 deletions
diff --git a/tmux.1 b/tmux.1
index 07a31d7d..d4330d18 100644
--- a/tmux.1
+++ b/tmux.1
@@ -3521,6 +3521,7 @@ The following variables are available, where appropriate:
 .It Li "client_tty" Ta "" Ta "Pseudo terminal of client"
 .It Li "client_utf8" Ta "" Ta "1 if client supports utf8"
 .It Li "client_width" Ta "" Ta "Width of client"
+.It Li "client_written" Ta "" Ta "Bytes written to client"
 .It Li "command" Ta "" Ta "Name of command in use, if any"
 .It Li "command_list_name" Ta "" Ta "Command name if listing commands"
 .It Li "command_list_alias" Ta "" Ta "Command alias if listing commands"