diff --git a/hosts/ocaml/bin/sx_server.ml b/hosts/ocaml/bin/sx_server.ml
index 74e9469c..a9fdc7a5 100644
--- a/hosts/ocaml/bin/sx_server.ml
+++ b/hosts/ocaml/bin/sx_server.ml
@@ -807,7 +807,9 @@ let () =
     Hashtbl.replace _loading_libs key true;
     let result = match resolve_library_path lib_spec with
       | Some path ->
-        (try load_library_file path; true
+        (try load_library_file path;
+          (* Verify the library actually registered *)
+          Sx_types.sx_truthy (Sx_ref.library_loaded_p lib_spec)
          with e ->
           Printf.eprintf "[import-hook] FAIL %s from %s: %s\n%!"
             key path (Printexc.to_string e);