diff --git a/erpnext/accounts/doctype/pricing_rule/utils.py b/erpnext/accounts/doctype/pricing_rule/utils.py
index fb2f9ff8991..c9a820e2e27 100644
--- a/erpnext/accounts/doctype/pricing_rule/utils.py
+++ b/erpnext/accounts/doctype/pricing_rule/utils.py
@@ -467,7 +467,7 @@ def apply_pricing_rule_on_transaction(doc):
 
 					if not d.get(pr_field): continue
 
-					if d.validate_applied_rule and doc.get(field) < d.get(pr_field):
+					if d.validate_applied_rule and doc.get(field) is not None and doc.get(field) < d.get(pr_field):
 						frappe.msgprint(_("User has not applied rule on the invoice {0}")
 							.format(doc.name))
 					else: