diff --git a/app/models/concerns/settings/nostr_settings.rb b/app/models/concerns/settings/nostr_settings.rb
index dbe49b5..84dba49 100644
--- a/app/models/concerns/settings/nostr_settings.rb
+++ b/app/models/concerns/settings/nostr_settings.rb
@@ -13,7 +13,7 @@ module Settings
         default: ENV["NOSTR_PUBLIC_KEY"].presence
 
       field :nostr_public_key_primary_domain, type: :string,
-        default: nil
+        default: ENV["NOSTR_PUBLIC_KEY_PRIMARY_DOMAIN"].presence
 
       field :nostr_relay_url, type: :string,
         default: ENV["NOSTR_RELAY_URL"].presence