diff --git a/docs/guide/mode-and-env.md b/docs/guide/mode-and-env.md
index 03437e39a3..f986fda7e5 100644
--- a/docs/guide/mode-and-env.md
+++ b/docs/guide/mode-and-env.md
@@ -55,6 +55,8 @@ Loaded variables will become available to all `vue-cli-service` commands, plugin
 An env file for a specific mode (e.g. `.env.production`) will take higher priority than a generic one (e.g. `.env`).
 
 In addition, environment variables that already exist when Vue CLI is executed have the highest priority and will not be overwritten by `.env` files.
+
+`.env` files are loaded at the start of `vue-cli-service`. Restart the service after making changes.
 :::
 
 ### Example: Staging Mode