Regime type matters for the choice of anti-corruption approaches. In recent years, most anti-corruption investments have been allocated to democratising regimes. Today several of these countries are backsliding, including Bangladesh, Brazil, Hungary, Tanzania, Turkey, and Zambia, among others. Often, de-democratisation is disguised as an effort to strengthen government efficiency or enact anti-corruption measures. Would-be autocrats use corruption to finance and sustain their power grab and may weaponise anti-corruption institutions towards the same end. Practitioners need to rethink anti-corruption efforts in de-democratising regimes.