1 files changed, 1 insertions, 0 deletions
diff --git a/tmux.h b/tmux.h
index b791f5af..16cf414b 100644
--- a/tmux.h
+++ b/tmux.h
@@ -1244,6 +1244,7 @@ struct tty {
 #define TTY_BLOCK 0x80
 #define TTY_HAVEDA 0x100
 #define TTY_HAVEDSR 0x200
+#define TTY_SYNCING 0x400
 	int		 flags;
 
 	struct tty_term	*term;