diff --git a/erpnext/accounts/doctype/pricing_rule/pricing_rule.py b/erpnext/accounts/doctype/pricing_rule/pricing_rule.py
index 19f571f..4d9053a 100644
--- a/erpnext/accounts/doctype/pricing_rule/pricing_rule.py
+++ b/erpnext/accounts/doctype/pricing_rule/pricing_rule.py
@@ -99,7 +99,7 @@
 				self.same_item = 1
 
 	def validate_max_discount(self):
-		if self.rate_or_discount == "Discount Percentage" and self.items:
+		if self.rate_or_discount == "Discount Percentage" and self.get("items"):
 			for d in self.items:
 				max_discount = frappe.get_cached_value("Item", d.item_code, "max_discount")
 				if max_discount and flt(self.discount_percentage) > flt(max_discount):