diff --git a/src/util/emacs.el b/src/util/emacs.el
index 085b45c85..22d5bb280 100644
--- a/src/util/emacs.el
+++ b/src/util/emacs.el
@@ -187,6 +187,7 @@
 "h/object.h"
 "h/eval.h"
 "h/external.h"
+"h/stacks.h"
 "c/character.d"
 "c/gfun.d"
 "c/num_comp.d"