diff --git a/docs/sources/set-up/open-source/index.md b/docs/sources/set-up/open-source/index.md
index c838d6563..002519260 100644
--- a/docs/sources/set-up/open-source/index.md
+++ b/docs/sources/set-up/open-source/index.md
@@ -221,6 +221,9 @@ The benefits of connecting to Grafana Cloud OnCall include:
 
 To connect to Grafana Cloud OnCall, refer to the **Cloud** page in your OSS Grafana OnCall instance.
 
+Check the Settings page for the Grafana Cloud OnCall API Url. If it's not `https://oncall-prod-us-central-0.grafana.net/oncall`, 
+you will need to set the `GRAFANA_CLOUD_ONCALL_API_URL` variable in your self-hosted OnCall, so that it can connect properly.
+
 ## Supported Phone Providers
 
 ### Exotel