1 files changed, 2 insertions, 0 deletions
diff --git a/tmux.h b/tmux.h
index 3a73dece..fe4a697b 100644
--- a/tmux.h
+++ b/tmux.h
@@ -1086,6 +1086,8 @@ struct session {
 #define SESSION_UNATTACHED 0x1	/* not attached to any clients */
 	int		 flags;
 
+	u_int            attached;
+
 	struct termios	*tio;
 
 	struct environ	 environ;