diff --git a/home-mandlm.nix b/home-mandlm.nix
index 8150346..a4e5c6f 100644
--- a/home-mandlm.nix
+++ b/home-mandlm.nix
@@ -90,6 +90,7 @@
     tmux = {
       enable = true;
       newSession = true;
+      keyMode = "vi";
       extraConfig = ''
         set-option -g status off
       '';