diff --git a/nixos/modules/services/misc/redmine.nix b/nixos/modules/services/misc/redmine.nix
index 20fa71507b6b0..6fe1ed5775796 100644
--- a/nixos/modules/services/misc/redmine.nix
+++ b/nixos/modules/services/misc/redmine.nix
@@ -267,9 +267,12 @@ in
       { assertion = cfg.database.passwordFile != null || cfg.database.socket != null;
         message = "one of services.redmine.database.socket or services.redmine.database.passwordFile must be set";
       }
-      { assertion = cfg.database.createLocally -> cfg.database.user == cfg.user && cfg.database.user == cfg.database.name;
+      { assertion = cfg.database.createLocally -> cfg.database.user == cfg.user;
         message = "services.redmine.database.user must be set to ${cfg.user} if services.redmine.database.createLocally is set true";
       }
+      { assertion = pgsqlLocal -> cfg.database.user == cfg.database.name;
+        message = "services.redmine.database.user and services.redmine.database.name must be the same when using a local postgresql database";
+      }
       { assertion = cfg.database.createLocally -> cfg.database.socket != null;
         message = "services.redmine.database.socket must be set if services.redmine.database.createLocally is set to true";
       }