diff --git a/modules/emacs/undo/packages.el b/modules/emacs/undo/packages.el
index b173386a0..d960bda32 100644
--- a/modules/emacs/undo/packages.el
+++ b/modules/emacs/undo/packages.el
@@ -1,7 +1,7 @@
 ;; -*- no-byte-compile: t; -*-
 ;;; emacs/undo/packages.el
 
-(if (not (featurep! +tree))
+(if (featurep! +tree)
     (package! undo-tree :pin "5b6df03781")
   (package! undo-fu :pin "0c34b6747e")
   (package! undo-fu-session :pin "b808ef0cdc"))