diff --git a/pkgs/top-level/ocaml-packages.nix b/pkgs/top-level/ocaml-packages.nix
index f35577c2b6f..ac48ade7206 100644
--- a/pkgs/top-level/ocaml-packages.nix
+++ b/pkgs/top-level/ocaml-packages.nix
@@ -672,7 +672,9 @@ let
 
     ocamlmod = callPackage ../development/tools/ocaml/ocamlmod { };
 
-    ocaml-monadic = callPackage ../development/ocaml-modules/ocaml-monadic { };
+    ocaml-monadic = callPackage ../development/ocaml-modules/ocaml-monadic {
+      ocaml-migrate-parsetree = ocaml-migrate-parsetree-2-1;
+    };
 
     ocaml_mysql = callPackage ../development/ocaml-modules/mysql { };