diff --git a/odoo/addons/base/models/ir_actions_report.py b/odoo/addons/base/models/ir_actions_report.py
index 78dd1045226..4c4a5610a06 100644
--- a/odoo/addons/base/models/ir_actions_report.py
+++ b/odoo/addons/base/models/ir_actions_report.py
@@ -944,5 +944,6 @@ class IrActionsReport(models.Model):
         py_ctx = json.loads(action.get('context', {}))
         report_action['close_on_report_download'] = True
         py_ctx['report_action'] = report_action
+        py_ctx['dialog_size'] = 'large'
         action['context'] = py_ctx
         return action