Correction for ‘Metal-free [3+3] benzannulation of 1-indanylidene-malononitrile with Morita–Baylis–Hillman carbonates: direct access to functionalized fluorene and fluorenone derivatives’ by Ya-Sa Xie et al., Chem. Commun., 2020, 56, 1948–1951, DOI: 10.1039/D0CC00143K.