diff --git a/src/lib/uTop_main.ml b/src/lib/uTop_main.ml
index 3728749..df7f4bf 100644
--- a/src/lib/uTop_main.ml
+++ b/src/lib/uTop_main.ml
@@ -869,5 +869,6 @@ let main () =
     exit 2
 
 (* Local variables: *)
-(* utop-package-list: ("camlp4" "camomile" "lwt" "lwt.react" "lwt.syntax" "lambda-term" "zed") *)
+(* utop-package-list: ("camomile" "lwt" "lwt.react" "lwt.syntax" "lambda-term" "zed") *)
+(* utop-ocaml-preprocessor: "camlp4o" *)
 (* End: *)