diff --git a/tmux/.tmux.conf b/tmux/.tmux.conf
index 15111be..fca52bd 100644
--- a/tmux/.tmux.conf
+++ b/tmux/.tmux.conf
@@ -84,24 +84,6 @@ set-option -g display-panes-active-colour brightwhite
 set-option -g clock-mode-colour white
 set-option -g clock-mode-style 24
 
+# REQUIRES TMUX 2.x
 # use F12 to move to inner/outer tmux sessions when nested
 # https://medium.freecodecamp.org/tmux-in-practice-local-and-nested-remote-tmux-sessions-4f7ba5db8795
-bind -T root F12 \
-	set prefix None \;\
-	set key-table off \;\
-    set window-status-format "#[fg=colour18,bg=brightblack] #I #[fg=white,bg=black] #W " \;\
-    set window-status-current-format "#[fg=colour18,bg=brightblac] #I #[fg=white,bg=blac] #W " \;\
-    set status-bg black \;\
-    set status-left "#[fg=white,bg=blac] #S #[fg=default,bg=default] " \;\
-    set status-right " #[fg=brightwhite,bg=black] %a, %d %b %H:%M #[fg=white,bg=blac] #(whoami)@#h " \;\
-    if -F '#{pane_in_mode}' 'send-keys -X cancel' \;\
-    #display-message "ENTER inner tmux ..."
-bind -T off F12 \
-	set -u prefix \;\
-	set -u key-table \;\
-    set -u window-status-format \;\
-    set -u window-status-current-format \;\
-    set -u status-left \;\
-    set -u status-right \;\
-    set -u status-bg \;\
-    #display-message "EXIT inner tmux ..."