diff --git a/doc/user/project/integrations/slack.md b/doc/user/project/integrations/slack.md
index af4ca35a215f576e6ef2cf83a33a01421c88102d..cac4a014855535b4c3b1e8b1da3eb86e6052cde4 100644
--- a/doc/user/project/integrations/slack.md
+++ b/doc/user/project/integrations/slack.md
@@ -19,7 +19,7 @@ The Slack Notifications Service allows your GitLab project to send events (e.g.
 1. For each event, optionally enter the Slack channel where you want to send the event. (Do _not_ include the `#` symbol.) If left empty, the event will be sent to the default channel that you configured in the Slack Configuration step.
 1. Paste the **Webhook URL** that you copied from the Slack Configuration step.
 1. Optionally customize the Slack bot username that will be sending the notifications.
-1. Configure the remaining options and click `Save changes`.
+1. Configure the remaining options and click `Save changes`, please note if the repository is empty you will receive an error when testing the integration.
 
 Your Slack team will now start receiving GitLab event notifications as configured.