diff --git a/build/run/installer.sh b/build/run/installer.sh
index 5c69db9..0f22c95 100755
--- a/build/run/installer.sh
+++ b/build/run/installer.sh
@@ -167,10 +167,12 @@ newaliases
 ###############
 # dovecot.conf
 cat >/etc/dovecot/dovecot.conf <<- dovecot.conf
-passdb sql {
+passdb {
+  driver = sql
   args = /etc/dovecot/dovecot-sql.conf.ext
 }
-userdb sql {
+userdb {
+  driver = sql
   args = /etc/dovecot/dovecot-sql.conf.ext
 }