From 5572366d9363b33b7e6fe530be8bfe73f30cd53f Mon Sep 17 00:00:00 2001
From: Val <8445610+valmack@users.noreply.github.com>
Date: Tue, 5 Jan 2021 10:48:15 -0500
Subject: [PATCH] Include instruction to enable variable expansion (#3115)

---
 docs/sources/configuration/_index.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/docs/sources/configuration/_index.md b/docs/sources/configuration/_index.md
index cd3e87121808..fef9aef88acd 100644
--- a/docs/sources/configuration/_index.md
+++ b/docs/sources/configuration/_index.md
@@ -69,7 +69,7 @@ non-list parameters the value is set to the specified default.
 > **Note:** This feature is only available in Loki 2.1+.
 
 You can use environment variable references in the configuration file to set values that need to be configurable during deployment.
-To do this, use:
+To do this, pass `-config.expand-env=true` and use:
 
 ```
 ${VAR}