diff --git a/project_report/report/project_timeline_report.py b/project_report/report/project_timeline_report.py
index d20f2a6..6318909 100755
--- a/project_report/report/project_timeline_report.py
+++ b/project_report/report/project_timeline_report.py
@@ -56,7 +56,7 @@ class ProjectTimelineReport(models.Model):
               date AS enddate,
               'Budgeted' as timeline_type,
               pro.budgeted_hours2 as hours,
-              (date - datestart) as timeline,
+              (date - date_start) as timeline,
               --DATE_PART('day', AGE(date, date_start)) AS timeline,
               pro.*
             FROM