diff --git a/src/sending-message.lisp b/src/sending-message.lisp
index bf2dc11..c844d49 100644
--- a/src/sending-message.lisp
+++ b/src/sending-message.lisp
@@ -16,7 +16,7 @@
 
 (in-package :sending-message)
 
-(define-constant +header-send-window-height+ 5 :test #'=)
+(define-constant +header-send-window-height+ 6 :test #'=)
 
 (defclass message-ready-to-send ()
   ((language