diff --git a/tmux/tmux.conf b/tmux/tmux.conf
index 593982b..1cdbda5 100644
--- a/tmux/tmux.conf
+++ b/tmux/tmux.conf
@@ -6,6 +6,7 @@ unbind C-b
 
 # use the damn mouse, for a change
 setw -g mouse on
+set-window-option -g mode-keys vi
 
 # colorful terminal
 set -g default-terminal "screen-256color"