Turkey's parliament is expected to end more than a year of delays that severely strained its ties with Western allies and approve Sweden's membership of NATO this week.
CNN Turk said a vote could be take place as early as Tuesday while a source told AFP that it might be held on Thursday.
Turkey's ratification would leave Hungary as the last holdout in an accession process that Sweden and its neighbor Finland began in response to Russia's invasion of Ukraine nearly two years ago.