diff --git a/docs/content/2.guide/4.going-further/10.runtime-config.md b/docs/content/2.guide/4.going-further/10.runtime-config.md
index 4a380f642f4..52eafbbbd71 100644
--- a/docs/content/2.guide/4.going-further/10.runtime-config.md
+++ b/docs/content/2.guide/4.going-further/10.runtime-config.md
@@ -35,6 +35,9 @@ console.log(runtimeConfig.apiSecret)
 console.log(runtimeConfig.public.apiBase)
 ```
 
+::alert{type=info}
+When using Options API the public runtime config is available via `this.$config.public`.
+
 ### Environment Variables
 
 The most common way to provide configuration is by using [Environment Variables](https://medium.com/chingu/an-introduction-to-environment-variables-and-how-to-use-them-f602f66d15fa).