diff --git a/compose.mariadb.yml b/compose.mariadb.yml
index 4802fd0..5928c72 100644
--- a/compose.mariadb.yml
+++ b/compose.mariadb.yml
@@ -29,9 +29,9 @@ services:
       - internal
     deploy:
       labels:
-        backupbot.backup.pre-hook: 'mysqldump --single-transaction -u root -p"$$(cat /run/secrets/db_root_password)" $MYSQL_DATABASE > /var/lib/mysql/backup.sql'
+        backupbot.backup.pre-hook: 'mysqldump --single-transaction -u root -p"$$(cat /run/secrets/db_root_password)" $${MYSQL_DATABASE} > /var/lib/mysql/backup.sql'
         backupbot.backup.volumes.mariadb.path: "backup.sql"
-        backupbot.restore.post-hook: 'mysql -u root -p"$$(cat /run/secrets/db_root_password)" $MYSQL_DATABASE < /var/lib/mysql/backup.sql'
+        backupbot.restore.post-hook: 'mysql -u root -p"$$(cat /run/secrets/db_root_password)" $${MYSQL_DATABASE} < /var/lib/mysql/backup.sql'
     healthcheck:
       test: ["CMD-SHELL", 'mysqladmin -p"$$(cat /run/secrets/db_root_password)"  ping']
       interval: 5s