diff --git a/erpnext/accounts/doctype/pricing_rule/pricing_rule.py b/erpnext/accounts/doctype/pricing_rule/pricing_rule.py
index 8f3289c6c29..11b0a6dbe64 100644
--- a/erpnext/accounts/doctype/pricing_rule/pricing_rule.py
+++ b/erpnext/accounts/doctype/pricing_rule/pricing_rule.py
@@ -369,7 +369,7 @@ def apply_internal_priority(pricing_rules, field_set, args):
 	filtered_rules = []
 	for field in field_set:
 		if args.get(field):
-			filtered_rules = filter(lambda x: x[field]==args[field], pricing_rules)
+			filtered_rules = list(filter(lambda x: x[field]==args[field], pricing_rules))
 			if filtered_rules: break
 
 	return filtered_rules or pricing_rules