diff --git a/app/jobs/uri_collection_job.rb b/app/jobs/uri_collection_job.rb
index 1bc6f768..4d369c2d 100644
--- a/app/jobs/uri_collection_job.rb
+++ b/app/jobs/uri_collection_job.rb
@@ -36,8 +36,10 @@ class UriCollectionJob < PeriodicJob
         # Reducir las estadísticas calculadas aplicando un rollup sobre el
         # intervalo más amplio.
         Stat::INTERVALS.reduce do |previous, current|
+          beginning_of_this_interval = beginning_of_interval.try(:"beginning_of_#{current}")
+
           Rollup.where(name: 'host|uri', interval: previous)
-                .where('time >= ?', beginning_of_interval)
+                .where('time >= ?', beginning_of_this_interval)
                 .where_dimensions(host: hostname, uri: uri)
                 .group("dimensions->'host'", "dimensions->'uri'")
                 .rollup('host|uri', interval: current, update: true) do |rollup|