diff --git a/docker-compose-generator/docker-fragments/mysql.yml b/docker-compose-generator/docker-fragments/mysql.yml
index 0fde6c9..80c844b 100644
--- a/docker-compose-generator/docker-fragments/mysql.yml
+++ b/docker-compose-generator/docker-fragments/mysql.yml
@@ -11,9 +11,9 @@ services:
 
   btcpayserver:
     environment:
-      BTCPAY_POSTGRES: Server=mysql;Database=btcpayserver${NBITCOIN_NETWORK:-regtest};Uid=root;Pwd=;Port=3306;
+      BTCPAY_MYSQL: Server=mysql;Database=btcpayserver${NBITCOIN_NETWORK:-regtest};Uid=root;Pwd=;Port=3306;
     links:
       - mysql
 
 volumes:
-    mysql_datadir:
\ No newline at end of file
+    mysql_datadir: