diff --git a/generator/python.ml b/generator/python.ml
index 11dc48102..e3f2fe1a6 100644
--- a/generator/python.ml
+++ b/generator/python.ml
@@ -524,7 +524,7 @@ and generate_python_actions actions () =
        | RStructList (_, typ) ->
            pr "  py_r = guestfs_int_py_put_%s_list (r);\n" typ;
            pr "  guestfs_free_%s_list (r);\n" typ
-       | RHashtable n ->
+       | RHashtable _ ->
            pr "  py_r = guestfs_int_py_put_table (r);\n";
            pr "  guestfs_int_free_string_list (r);\n"
        | RBufferOut _ ->