diff --git a/pillar/role/discourse.sls b/pillar/role/discourse.sls
index 67fb700..20383f7 100644
--- a/pillar/role/discourse.sls
+++ b/pillar/role/discourse.sls
@@ -14,7 +14,7 @@ profile:
       append_dot_mydomain: 'no'
       mydestination: localhost
       mynetworks: '127.0.0.0/8 [::1]/128 [fe80::]/64'
-      transport_maps: hash:/etc/postfix/transport
+      transport_maps: lmdb:/etc/postfix/transport
       smtpd_recipient_restrictions: permit_mynetworks, check_policy_service unix:private/policy
     mastercf:
       discourse: unix - n n - - pipe user=nobody:nogroup argv=/usr/bin/receive-mail ${recipient}