diff --git a/app/controllers/duplicate_logs_controller.rb b/app/controllers/duplicate_logs_controller.rb
index 21e853bf9..4d7307dd7 100644
--- a/app/controllers/duplicate_logs_controller.rb
+++ b/app/controllers/duplicate_logs_controller.rb
@@ -47,4 +47,14 @@ private
       %w[owning_organisation_id saledate purchid age1 sex1 ecstat1 postcode_full]
     end
   end
+
+private
+
+  def find_resource_by_named_id
+    @log = if params[:sales_log_id].present?
+             current_user.sales_logs.visible.find_by(id: params[:sales_log_id])
+           else
+             current_user.lettings_logs.visible.find_by(id: params[:lettings_log_id])
+           end
+  end
 end