diff --git a/src/kernel/mconfig_dot.ml b/src/kernel/mconfig_dot.ml
index 0a42a1d3..91997190 100644
--- a/src/kernel/mconfig_dot.ml
+++ b/src/kernel/mconfig_dot.ml
@@ -146,10 +146,10 @@ end = struct
       let prog, args =
         match cfg with
         | Dot_merlin ->
-          let prog = "dot-merlin-reader" in
+          let prog = "@dot-merlin-reader@" in
           (prog, [| prog |])
         | Dune ->
-          let prog = "dune" in
+          let prog = "@dune@" in
           (prog, [| prog; "ocaml-merlin"; "--no-print-directory" |])
       in
       let cwd = Sys.getcwd () in