/* Someone else may have expanded the file, so retry. */
old_size = tdb->file->map_size;
- tdb->tdb2.io->oob(tdb, tdb->file->map_size + 1, true);
+ tdb->tdb2.io->oob(tdb, tdb->file->map_size, 1, true);
if (tdb->file->map_size != old_size) {
tdb_unlock_expand(tdb, F_WRLCK);
return TDB_SUCCESS;