diff --git a/install/ubuntu/18.04/dovecot/dovecot.conf b/install/ubuntu/18.04/dovecot/dovecot.conf
index 311a33517..163460bab 100644
--- a/install/ubuntu/18.04/dovecot/dovecot.conf
+++ b/install/ubuntu/18.04/dovecot/dovecot.conf
@@ -3,7 +3,7 @@ listen = *, ::
 base_dir = /var/run/dovecot/
 !include conf.d/*.conf
 
-namespace {
+namespace inbox {
     type = private
     separator = /
     prefix =