diff --git a/lib/cartodb/models/dataview/histogram.js b/lib/cartodb/models/dataview/histogram.js
index be4c7193..9db9e0e7 100644
--- a/lib/cartodb/models/dataview/histogram.js
+++ b/lib/cartodb/models/dataview/histogram.js
@@ -161,9 +161,9 @@ var dateHistogramQueryTpl = dot.template([
     '    END AS bin,',
     '    min(date_part(',
     '       \'epoch\', ',
-    '       date_trunc(\'{{=it._aggregation}}\', d AT TIME ZONE \'{{=it._timezone}}\'',
+    '       date_trunc(\'{{=it._aggregation}}\', {{=it._column}} AT TIME ZONE \'{{=it._timezone}}\'',
     '    ) AT TIME ZONE \'{{=it._timezone}}\'))::numeric AS timestamp,',
-    '    min(date_part(\'epoch\', {{=it._column}}))::numeric AS min,',
+    '    min(date_part(\'epoch\', ))::numeric AS min,',
     '    max(date_part(\'epoch\', {{=it._column}}))::numeric AS max,',
     '    avg(date_part(\'epoch\', {{=it._column}}))::numeric AS avg,',
     '    count(*) AS freq',