1 files changed, 1 insertions, 1 deletions
diff --git a/tmux.h b/tmux.h
index 9209226a..9cf60ecb 100644
--- a/tmux.h
+++ b/tmux.h
@@ -1312,7 +1312,7 @@ struct tty {
 #define TTY_NOCURSOR 0x1
 #define TTY_FREEZE 0x2
 #define TTY_TIMER 0x4
-/* 0x8 unused */
+#define TTY_NOBLOCK 0x8
 #define TTY_STARTED 0x10
 #define TTY_OPENED 0x20
 /* 0x40 unused */