diff --git a/target/scripts/startup/setup-stack.sh b/target/scripts/startup/setup-stack.sh
index 31cf49a3..9e11fb59 100644
--- a/target/scripts/startup/setup-stack.sh
+++ b/target/scripts/startup/setup-stack.sh
@@ -231,7 +231,7 @@ function _setup_dovecot_quota
           "s|mail_plugins = \$mail_plugins|mail_plugins = \$mail_plugins quota|g" \
           /etc/dovecot/conf.d/10-mail.conf
         sed -i \
-          "s|mail_plugins = \$mail_plugin|mail_plugins = \$mail_plugins imap_quota|g" \
+          "s|mail_plugins = \$mail_plugins|mail_plugins = \$mail_plugins imap_quota|g" \
           /etc/dovecot/conf.d/20-imap.conf
       fi