diff --git a/nixos/modules/services/databases/postgresql.xml b/nixos/modules/services/databases/postgresql.xml
index 02db47568d33..72d4a8249a32 100644
--- a/nixos/modules/services/databases/postgresql.xml
+++ b/nixos/modules/services/databases/postgresql.xml
@@ -52,7 +52,7 @@ Type "help" for help.
 
   <para>
    By default, PostgreSQL stores its databases in
-   <filename>/var/db/postgresql</filename>. You can override this using
+   <filename>/var/lib/postgresql/$psqlSchema</filename>. You can override this using
    <xref linkend="opt-services.postgresql.dataDir"/>, e.g.
 <programlisting>
 <xref linkend="opt-services.postgresql.dataDir"/> = "/data/postgresql";