diff --git a/CHANGES.md b/CHANGES.md
index f5e5cb20a3ad..98165b4dd85c 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -177,6 +177,9 @@ Unreleased
   new `(subst <disable|enable>)` stanza to the `dune-project` file.
   (#4864, @kit-ty-kate)
 
+- No longer reference deprecated Toploop functions when using dune files in
+  OCaml syntax. (#4834, fixes #4830, @nojb)
+
 2.9.1 (07/09/2021)
 ------------------
 
diff --git a/src/dune_rules/assets.ml b/src/dune_rules/assets.ml
index c822c4fa253f..a5d6563d9b47 100644
--- a/src/dune_rules/assets.ml
+++ b/src/dune_rules/assets.ml
@@ -1,7 +1,9 @@
 let jbuild_plugin_ml = {jbp|
 let () =
   let open Toploop in
-  let set_directive name desc = add_directive name desc (get_directive_info name) in
+  let set_directive name desc =
+    add_directive name desc (get_directive_info name)
+  in
   set_directive "require" (Directive_string ignore);
   set_directive "use"
     (Directive_string
@@ -74,4 +76,4 @@ module V1 : sig
   (** Execute a command and read its output *)
   val run_and_read_lines : string -> string list
 end
-|jbp}
+|jbp}
\ No newline at end of file