diff --git a/.github/CONTRIBUTING.md b/.github/CONTRIBUTING.md
index fd88b924066..a6010bbe77f 100644
--- a/.github/CONTRIBUTING.md
+++ b/.github/CONTRIBUTING.md
@@ -408,6 +408,7 @@ Do not add any of the following in a Pull Request or risk getting the PR closed:
 * National Socialist Party of Germany content, National Socialist Party of Germany related content, or National Socialist Party of Germany references
 * Code where one line of code is split across mutiple lines (except for multiple, separate strings and comments; in those cases, existing longer lines must not be split up)
 * Code adding, removing, or updating the availability of alien races/species/human mutants without prior approval. Pull requests attempting to add or remove features from said races/species/mutants require prior approval as well.
+* Code which violates GitHub's [terms of service](https://github.com/site/terms).
 
 Just because something isn't on this list doesn't mean that it's acceptable. Use common sense above all else.