Initial mass function in the simulation containing ~500 protostars distributed in 429 systems and sampled 0.76 Myr after the formation of the first protostar. The dashed line is the corresponding Chabrier system IMF. We have excluded stars, which either have an accretion rate above 1 × 10^-5 M_⊙ yr^-1 (2 stars), would double their mass in less than 100 kyr (9 stars), or stars which are younger than 50 kyr (23 stars). This removes objects, which would not normally be included in an IMF, because they are heavily embedded, either due to young age or high accretion rates.