diff --git a/postfix.nix b/postfix.nix
index cf41993..7bd2df2 100644
--- a/postfix.nix
+++ b/postfix.nix
@@ -200,12 +200,12 @@ in {
 
           passdb {
             driver = ldap
-            args = ${ldap-conf}
+            args = ${cfg.ldap-conf}
           }
 
           userdb = {
             driver = ldap
-            args = ${ldap-conf}
+            args = ${cfg.ldap-conf}
           }
 
           service auth {