diff --git a/content/github/setting-up-and-managing-your-github-user-account/changing-your-primary-email-address.md b/content/github/setting-up-and-managing-your-github-user-account/changing-your-primary-email-address.md
index 0c78291e6a61..7704249f86b5 100644
--- a/content/github/setting-up-and-managing-your-github-user-account/changing-your-primary-email-address.md
+++ b/content/github/setting-up-and-managing-your-github-user-account/changing-your-primary-email-address.md
@@ -7,6 +7,11 @@ versions:
   free-pro-team: '*'
   enterprise-server: '*'
 ---
+{% note %}
+
+**Note:** You cannot change your primary email address to an email that is already set to be your backup email address.
+
+{% endnote %}
 
 {% data reusables.user_settings.access_settings %}
 {% data reusables.user_settings.emails %}