diff --git a/content/docs/2.15/scalers/mysql.md b/content/docs/2.15/scalers/mysql.md
index 8598d34c8..0dd3947ab 100644
--- a/content/docs/2.15/scalers/mysql.md
+++ b/content/docs/2.15/scalers/mysql.md
@@ -35,6 +35,7 @@ Some parameters could be provided using environmental variables, instead of sett
 
 - `hostFromEnv` - The host of the MySQL server, similar to `host`, but reads it from an environment variable on the scale target.
 - `portFromEnv` - The port of the MySQL server, similar to `port`, but reads it from an environment variable on the scale target.
+- `usernameFromEnv` - The username for connecting with host of the MySQL server, similar to `username`, but reads it from an environment variable on the scale target.
 
 ### Authentication Parameters