diff --git a/pkgs/development/ocaml-modules/sedlex/default.nix b/pkgs/development/ocaml-modules/sedlex/default.nix
index 653f45325857..e9b3721bc682 100644
--- a/pkgs/development/ocaml-modules/sedlex/default.nix
+++ b/pkgs/development/ocaml-modules/sedlex/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchzip, ocaml, findlib, gen, ppx_tools_versioned }:
+{ stdenv, fetchzip, ocaml, findlib, gen, ppx_tools_versioned, ocaml-migrate-parsetree }:
 
 if !stdenv.lib.versionAtLeast ocaml.version "4.02"
 then throw "sedlex is not available for OCaml ${ocaml.version}"
@@ -13,9 +13,9 @@ stdenv.mkDerivation rec {
     sha256 = "0phnqyn6mpv5byr1kkphl24y9q9fb2k3xg9yb457h5816q6ya72n";
   };
 
-  buildInputs = [ ocaml findlib ppx_tools_versioned ];
+  buildInputs = [ ocaml findlib ];
 
-  propagatedBuildInputs = [ gen ];
+  propagatedBuildInputs = [ gen ocaml-migrate-parsetree ppx_tools_versioned ];
 
   buildFlags = [ "all" "opt" ];