diff --git a/ocaml/idl/schematest.ml b/ocaml/idl/schematest.ml
index c375a909149..0afe0a10be1 100644
--- a/ocaml/idl/schematest.ml
+++ b/ocaml/idl/schematest.ml
@@ -3,7 +3,7 @@ let hash x = Digest.string x |> Digest.to_hex
 (* BEWARE: if this changes, check that schema has been bumped accordingly in
    ocaml/idl/datamodel_common.ml, usually schema_minor_vsn *)
 
-let last_known_schema_hash = "428caff23cdb969c59a9960beefd7bb6"
+let last_known_schema_hash = "60590fa3fa2f8af66d9bf3c50b7bacc2"
 
 let current_schema_hash : string =
   let open Datamodel_types in
@@ -19,11 +19,10 @@ let () =
   if last_known_schema_hash <> current_schema_hash then (
     Printf.eprintf
       {|
-
 New schema hash ('%s') doesn't match the last known one. Please bump the
-datamodel schema versions if necessary, and update 'last_known_schema_hash'.
-
+datamodel schema versions if necessary, and update 'last_known_schema_hash'
+in file %s.
 |}
-      current_schema_hash ;
+      current_schema_hash __FILE__ ;
     exit 1
   )