diff --git a/erpnext/projects/report/project_summary/project_summary.py b/erpnext/projects/report/project_summary/project_summary.py
index 66d68bd..a20d7f2 100644
--- a/erpnext/projects/report/project_summary/project_summary.py
+++ b/erpnext/projects/report/project_summary/project_summary.py
@@ -112,6 +112,9 @@
 	}
 
 def get_report_summary(data):
+	if not data:
+		return None
+
 	avg_completion = sum([project.percent_complete for project in data]) / len(data)
 	total = sum([project.total_tasks for project in data])
 	total_overdue = sum([project.overdue_tasks for project in data])