diff --git a/content/repositories/managing-your-repositorys-settings-and-features/customizing-your-repository/about-code-owners.md b/content/repositories/managing-your-repositorys-settings-and-features/customizing-your-repository/about-code-owners.md
index 7c7f48b199..969a1a3430 100644
--- a/content/repositories/managing-your-repositorys-settings-and-features/customizing-your-repository/about-code-owners.md
+++ b/content/repositories/managing-your-repositorys-settings-and-features/customizing-your-repository/about-code-owners.md
@@ -116,12 +116,16 @@ apps/ @octocat
 /apps/ @octocat
 /apps/github
 ```
-### Syntax exceptions
-There are some syntax rules for gitignore files that do not work in CODEOWNERS files:
+
+{% warning %}
+
+**Warning:** There are some syntax rules for gitignore files that *do not work* in CODEOWNERS files:
 - Escaping a pattern starting with `#` using `\` so it is treated as a pattern and not a comment
 - Using `!` to negate a pattern
 - Using `[ ]` to define a character range
 
+{% endwarning %}
+
 ## CODEOWNERS and branch protection
 Repository owners can add branch protection rules to ensure that changed code is reviewed by the owners of the changed files. For more information, see "[About protected branches](/github/administering-a-repository/defining-the-mergeability-of-pull-requests/about-protected-branches)."