diff --git a/app/controllers/stats_controller.rb b/app/controllers/stats_controller.rb
index 3fe821a..b9b93e9 100644
--- a/app/controllers/stats_controller.rb
+++ b/app/controllers/stats_controller.rb
@@ -121,7 +121,7 @@ class StatsController < ApplicationController
   # toma de estadísticas y restando el tiempo que pasó desde ese
   # momento.
   def chart_options
-    time = last_stat.created_at + 1.try(interval)
+    time = (last_stat&.created_at || Time.now) + 1.try(interval)
     please_return_at = { please_return_at: distance_of_time_in_words(Time.now, time) }
 
     @chart_options ||= {