diff --git a/app/controllers/conferences_controller.rb b/app/controllers/conferences_controller.rb
index a9f7f40..e5f4f39 100644
--- a/app/controllers/conferences_controller.rb
+++ b/app/controllers/conferences_controller.rb
@@ -487,7 +487,7 @@ class ConferencesController < ApplicationController
 					end
 				rescue => error
 					logger.info "Error adding row to stats.xls: #{error.message}"
-					logger.info error.backtrace
+					logger.info error.backtrace.join("\n\t\t")
 				end
 			end
 		end