diff --git a/frappe/desk/query_report.py b/frappe/desk/query_report.py
index adfc4e4692..40f049d2ad 100644
--- a/frappe/desk/query_report.py
+++ b/frappe/desk/query_report.py
@@ -475,6 +475,11 @@ def add_total_row(result, columns, meta=None, is_tree=False, parent_field=None):
 			if i >= len(row):
 				continue
 			cell = row.get(fieldname) if isinstance(row, dict) else row[i]
+			if fieldtype is None:
+				if isinstance(cell, int):
+					fieldtype = "Int"
+				elif isinstance(cell, float):
+					fieldtype = "Float"
 			if fieldtype in ["Currency", "Int", "Float", "Percent", "Duration"] and flt(cell):
 				if not (is_tree and row.get(parent_field)):
 					total_row[i] = flt(total_row[i]) + flt(cell)