diff --git a/content/en/2017-05-17-when-in-doubt-upgrade.md b/content/en/2017-05-17-when-in-doubt-upgrade.md
index 94845be51f..356465b1c5 100644
--- a/content/en/2017-05-17-when-in-doubt-upgrade.md
+++ b/content/en/2017-05-17-when-in-doubt-upgrade.md
@@ -79,6 +79,7 @@ P.S. A list of issues solved simply by updating packages:
 - [Rmarkdown doesn't knit the specified document but renders the copernicus.docx file](https://github.com/rstudio/bookdown/issues/1152#issuecomment-862675150)
 - [Error when visualizing](https://github.com/radiant-rstats/radiant/issues/193)
 - [markdownExtensions problem when trying to run a tutorial](https://github.com/rstudio/markdown/issues/98)
+- [Error in xfun::normalize_path when knit RMarkdown to HTML](https://github.com/yihui/xfun/issues/79)
 
 [^1]: I guess the vast majority of R users always install and use a single version of R.