diff --git a/sh/tmux.sh b/sh/tmux.sh
index c4ab925..1100060 100644
--- a/sh/tmux.sh
+++ b/sh/tmux.sh
@@ -147,7 +147,7 @@ set-option -g status-format[4] '\
 #{P:\
 #{?pane_active,#[fg=green],#[fg=default]}\
  \
-#{pane_index}\
+#{window_index}.#{pane_index}\
  \
 #[fg=blue]#{pane_width}×#{pane_height}\
  \