# EPUBCheck HTM_060b: EPUB reading systems must ignore…

Source: https://epublab.com/epubcheck/htm_060b/ (updated 2026-11-03)

EPUBCheck HTM_060b is a usage message: “EPUB reading systems must ignore viewport meta elements in reflowable documents; viewport declaration "…" will be ignored.” A reflowable document has a viewport meta element, which reading apps ignore.

- Official message (EPUBCheck 5.4.0): EPUB reading systems must ignore viewport meta elements in reflowable documents; viewport declaration "%1$s" will be ignored.
- Default severity: Usage

## Typical causes

- Head content copied from web pages or from fixed-layout templates.

## How to fix it

- Remove the viewport meta element from reflowable documents.

Message text and severity: EPUBCheck (W3C, BSD-3-Clause). Explanation: EPUBLab.