diff --git a/install/dist/lib/fedora.lib.php b/install/dist/lib/fedora.lib.php
index e88d4491ddbca94284119ea3b4077db396ae10f7..0a096e0e077475f6ef62d056f9bdf1e041c72895 100644
--- a/install/dist/lib/fedora.lib.php
+++ b/install/dist/lib/fedora.lib.php
@@ -102,7 +102,7 @@ class installer_dist extends installer_base {
 			'transport_maps = proxy:mysql:'.$config_dir.'/mysql-virtual_transports.cf',
 			'relay_domains = mysql:'.$config_dir.'/mysql-virtual_relaydomains.cf',
 			'virtual_create_maildirsize = yes',
-			'virtual_mailbox_extended = yes',
+			'virtual_maildir_extended = yes',
 			'virtual_mailbox_limit_maps = proxy:mysql:'.$config_dir.'/mysql-virtual_mailbox_limit_maps.cf',
 			'virtual_mailbox_limit_override = yes',
 			'virtual_maildir_limit_message = "The user you are trying to reach is over quota."',
diff --git a/install/dist/lib/opensuse.lib.php b/install/dist/lib/opensuse.lib.php
index 26af5b7fb8da8554961ca31630cd7cdd09ee3988..c499653d8012ac2318c2140cdaacf1afc903d906 100644
--- a/install/dist/lib/opensuse.lib.php
+++ b/install/dist/lib/opensuse.lib.php
@@ -102,7 +102,7 @@ class installer_dist extends installer_base {
 			'transport_maps = proxy:mysql:'.$config_dir.'/mysql-virtual_transports.cf',
 			'relay_domains = mysql:'.$config_dir.'/mysql-virtual_relaydomains.cf',
 			'virtual_create_maildirsize = yes',
-			'virtual_mailbox_extended = yes',
+			'virtual_maildir_extended = yes',
 			'virtual_mailbox_limit_maps = proxy:mysql:'.$config_dir.'/mysql-virtual_mailbox_limit_maps.cf',
 			'virtual_mailbox_limit_override = yes',
 			'virtual_maildir_limit_message = "The user you are trying to reach is over quota."',
diff --git a/install/lib/installer_base.lib.php b/install/lib/installer_base.lib.php
index ea4e382cc0868ce88da29dd26f020017aacd5f39..4dd6e221f732c8dbd26d116529d3ca086e5415a5 100644
--- a/install/lib/installer_base.lib.php
+++ b/install/lib/installer_base.lib.php
@@ -374,7 +374,7 @@ class installer_base {
 			'transport_maps = proxy:mysql:'.$config_dir.'/mysql-virtual_transports.cf',
 			'relay_domains = mysql:'.$config_dir.'/mysql-virtual_relaydomains.cf',
 			'virtual_create_maildirsize = yes',
-			'virtual_mailbox_extended = yes',
+			'virtual_maildir_extended = yes',
 			'virtual_mailbox_limit_maps = proxy:mysql:'.$config_dir.'/mysql-virtual_mailbox_limit_maps.cf',
 			'virtual_mailbox_limit_override = yes',
 			'virtual_maildir_limit_message = "The user you are trying to reach is over quota."',