diff --git a/lib.nix b/lib.nix
index 70f0d8d..488ce36 100644
--- a/lib.nix
+++ b/lib.nix
@@ -30,7 +30,7 @@ let
 
   getDomainPostgresqlServer = hostname:
     let domain-name = entities.hosts."${hostname}".domain;
-    in getHostFqdn entities.domain."${domain-name}".postgresql-server;
+    in getHostFqdn entities.domains."${domain-name}".postgresql-server;
 
 in {
   inherit getHostSite getHostDomain getHostRealm getHostFqdn getHostIpv4