diff --git a/.dir-locals.el b/.dir-locals.el
index 083ff5b..6897e69 100644
--- a/.dir-locals.el
+++ b/.dir-locals.el
@@ -1,6 +1,7 @@
 ((nil
   (indent-tabs-mode . nil))
  (makefile-gmake-mode
-  (outline-regexp . "##"))
+  (outline-regexp . "##")
+  (mode . outline-minor))
  (".github"
   (nil . ((truncate-lines . nil)))))