diff --git a/delivery_automatic_print/models/stock_picking.py b/delivery_automatic_print/models/stock_picking.py
index 0a41aa1..51d429d 100644
--- a/delivery_automatic_print/models/stock_picking.py
+++ b/delivery_automatic_print/models/stock_picking.py
@@ -34,6 +34,7 @@ def button_validate(self):
             else:
                 pickings = self
 
-            report.sudo()._render_qweb_pdf(pickings.ids)
+            if pickings:
+                report.sudo()._render_qweb_pdf(pickings.ids)
 
         return res