diff --git a/app/models/concerns/account_finder_concern.rb b/app/models/concerns/account_finder_concern.rb
index 561c7ab9f8216aa7ca913e44a28bb055d321c87b..2e8a7fb3799b48539facaa60254a2113b25cbdbb 100644
--- a/app/models/concerns/account_finder_concern.rb
+++ b/app/models/concerns/account_finder_concern.rb
@@ -44,7 +44,7 @@ module AccountFinderConcern
     end
 
     def with_usernames
-      Account.where.not(username: [nil, ''])
+      Account.where.not(username: '')
     end
 
     def matching_username