diff --git a/option/rule_dns.go b/option/rule_dns.go
index 464d573a..c6ad2db9 100644
--- a/option/rule_dns.go
+++ b/option/rule_dns.go
@@ -146,7 +146,7 @@ type LogicalDNSRule struct {
 	DNSRuleAction
 }
 
-func (r *LogicalDNSRule) MarshalJSON() ([]byte, error) {
+func (r LogicalDNSRule) MarshalJSON() ([]byte, error) {
 	return badjson.MarshallObjects(r.RawLogicalDNSRule, r.DNSRuleAction)
 }