diff --git a/sh/tmux.sh b/sh/tmux.sh
index 6bfaaca..4ab6c3a 100644
--- a/sh/tmux.sh
+++ b/sh/tmux.sh
@@ -51,6 +51,8 @@ set-option -g set-titles on
 
 # set title to working directory
 set-option -g set-titles-string '\
+#(basename "\${TMUX}" | cut --delimiter "," --fields "1")\
+ - \
 #{session_name}\
  - \
 #{window_index}∕#{session_windows} #{window_name}\