diff --git a/app/interactions/actions/domain_update.rb b/app/interactions/actions/domain_update.rb
index 60b8b59cc..6bc4894ae 100644
--- a/app/interactions/actions/domain_update.rb
+++ b/app/interactions/actions/domain_update.rb
@@ -60,7 +60,12 @@ module Actions
       return if domain.registrant == new_registrant
 
       @changes_registrant = true if domain.registrant.ident != new_registrant.ident
-      domain.registrant = new_registrant
+      if @changes_registrant && domain.registrant_change_prohibited?
+        domain.add_epp_error(2304, "status", DomainStatus::SERVER_REGISTRANT_CHANGE_PROHIBITED,
+                             I18n.t(:object_status_prohibits_operation))
+      else
+        domain.registrant = new_registrant
+      end
     end
 
     def assign_nameserver_modifications