diff --git a/app/api/mobile/middleware/error_handler.rb b/app/api/mobile/middleware/error_handler.rb
index e827cb4d8..699dd1537 100644
--- a/app/api/mobile/middleware/error_handler.rb
+++ b/app/api/mobile/middleware/error_handler.rb
@@ -8,7 +8,7 @@ module Mobile
         rescue =>e
           message = {status: 1, message: e.message }.to_json
           Rails.logger.error e.inspect
-          Rails.logger.error e.backtrace
+          Rails.logger.error e.backtrace.join("\n")
           status = 200
           headers = { 'Content-Type' => content_type }
           Rack::Response.new([message], status, headers).finish