diff --git a/pkg/generic/thrift/parse_option.go b/pkg/generic/thrift/parse_option.go
index 0bd95220aa..9fffd321a2 100644
--- a/pkg/generic/thrift/parse_option.go
+++ b/pkg/generic/thrift/parse_option.go
@@ -41,6 +41,8 @@ func WithGoTagDisabled(disable bool) ParseOption {
 	}}
 }
 
+// WithIDLServiceName specifies the target IDL service to be parsed.
+// NOTE: with this option, the specified service is prioritized and parse mode will be ignored.
 func WithIDLServiceName(serviceName string) ParseOption {
 	return ParseOption{F: func(opt *parseOptions) {
 		opt.serviceName = serviceName