diff --git a/modoboa_installer/scripts/files/dovecot/dovecot-sql-mysql.conf.ext.tpl b/modoboa_installer/scripts/files/dovecot/dovecot-sql-mysql.conf.ext.tpl
index f370cfd..8dc8446 100644
--- a/modoboa_installer/scripts/files/dovecot/dovecot-sql-mysql.conf.ext.tpl
+++ b/modoboa_installer/scripts/files/dovecot/dovecot-sql-mysql.conf.ext.tpl
@@ -137,4 +137,4 @@ password_query = SELECT email AS user, password FROM core_user WHERE email='%%u'
 
 # Query to get a list of all usernames.
 #iterate_query = SELECT username AS user FROM users
-iterate_query = SELECT email AS username FROM core_user
+iterate_query = SELECT email AS user FROM core_user
diff --git a/modoboa_installer/scripts/files/dovecot/dovecot-sql-postgres.conf.ext.tpl b/modoboa_installer/scripts/files/dovecot/dovecot-sql-postgres.conf.ext.tpl
index 2b4a160..bc2aa66 100644
--- a/modoboa_installer/scripts/files/dovecot/dovecot-sql-postgres.conf.ext.tpl
+++ b/modoboa_installer/scripts/files/dovecot/dovecot-sql-postgres.conf.ext.tpl
@@ -137,4 +137,4 @@ password_query = SELECT email AS user, password FROM core_user WHERE email='%%u'
 
 # Query to get a list of all usernames.
 #iterate_query = SELECT username AS user FROM users
-iterate_query = SELECT email AS username FROM core_user
+iterate_query = SELECT email AS user FROM core_user