diff --git a/ui/src/utils/validators.ts b/ui/src/utils/validators.ts
index 94f8ae85..05d43edd 100644
--- a/ui/src/utils/validators.ts
+++ b/ui/src/utils/validators.ts
@@ -4,7 +4,7 @@ export const validCronExpression = (value: string) => {
   return _validCronExpression(value);
 };
 
-export const validDomainName = (value: string, { allowWildcard = false }: { allowWildcard?: boolean }) => {
+export const validDomainName = (value: string, { allowWildcard = false }: { allowWildcard?: boolean } = {}) => {
   const re = allowWildcard ? /^(?:\*\.)?([a-zA-Z0-9-]+\.)+[a-zA-Z]{1,}$/ : /^(?!-)[A-Za-z0-9-]{1,}(?<!-)(\.[A-Za-z0-9-]{1,}(?<!-)){0,}$/;
   return re.test(value);
 };