We found an error in (2.4) of Ledda et al. (Reference Ledda, Balestra, Lerisson, Scheid, Wyart and Gallaire2021). The correct non-dimensional expression for the curvature of the free surface is
![](https://static.cambridge.org/binary/version/id/urn:cambridge.org:id:binary:20210916173545226-0906:S002211202100700X:S002211202100700X_eqnU1.png?pub-status=live)
While this error does not bear any consequence in the linear analysis at the core of this paper, the value $h_{N}/l_{c}^{*}=1$ has to be specified in figures 15, 16, 17, 21, without altering the discussion.
Funding
We acknowledge the Swiss National Science Foundation under grant 200021_178971.
Declaration of interests
The authors report no conflict of interest.