diff --git a/hot-configs/tmux.conf b/hot-configs/tmux.conf
index c26f707..2cf5bca 100644
--- a/hot-configs/tmux.conf
+++ b/hot-configs/tmux.conf
@@ -1,5 +1,8 @@
 set -g prefix C-Space
 
+set -g extended-keys on
+set -g extended-keys-format csi-u # pi asked it
+
 set -g mouse on
 set -g base-index 1
 set -g pane-base-index 1