diff --git a/README.md b/README.md
index 5776108..2ef3324 100644
--- a/README.md
+++ b/README.md
@@ -69,7 +69,7 @@ See below for how to configure the environment variables appropriately
 
 ```yaml
 - TeslaMate__EnergyProvider=Awattar
-- Awattar_VATMultiplier=1.00 # Optional (default: 1.19), you should not need to set this unless your VAT differs from the default
+- Awattar__VATMultiplier=1.00 # Optional (default: 1.19), you should not need to set this unless your VAT differs from the default
 ```
 
 ## Optional environment variables