Correction of unit in Table 1 (Line 4) Hongzhang Chen, Chinese Academy of Sciences, Beijing 100190, China 30 July 2015 The information about the paper “A novel solid state fermentation coupled with gas stripping enhancing the sweet sorghum stalk conversion performance for bioethanol.Biotechnology for Biofuels 2014, 7:53.” is corrected as follows: “6.25 g ethanol/100 g drystalk” in Table 1 (Line 4) is corrected as “6.25 g ethanol/100 g fresh stalk”. The related reference is “Li SH, Li GM, Zhang L, Zhou ZX, Han B, Hou WH, Wang JB, Li TC: A demonstration study of ethanol production from sweet sorghum stems with advanced solid state fermentation technology. Appl Energ 2013,102:260–265.” , in which "A total of 16 ton of sweet sorghum stems (with 13.5% sugar content and 70% moisture) are used to produce 1 ton of ethanol (99.5%, v/v). " was reported. Competing interests The authors declare that they have no competing interests.