diff --git a/src/domains.js b/src/domains.js
index e2d8048ea..3e8d59592 100644
--- a/src/domains.js
+++ b/src/domains.js
@@ -85,7 +85,7 @@ async function verifyDomainConfig(domainConfig, domain, zoneName, provider) {
     const backend = api(provider);
     if (!backend) throw new BoxError(BoxError.BAD_FIELD, 'Invalid provider');
 
-    const domainObject = { config: domainConfig, domain: domain, zoneName: zoneName };
+    const domainObject = { config: domainConfig, domain, zoneName };
     const [error, sanitizedConfig] = await safe(api(provider).verifyDomainConfig(domainObject));
     if (error && error.reason === BoxError.ACCESS_DENIED) throw new BoxError(BoxError.BAD_FIELD, `Access denied: ${error.message}`);
     if (error && error.reason === BoxError.NOT_FOUND) throw new BoxError(BoxError.BAD_FIELD, `Zone not found: ${error.message}`);
@@ -137,8 +137,8 @@ async function add(domain, data, auditSource) {
 
     let zoneName;
     if (data.zoneName) {
-        if (!tld.isValid(zoneName)) throw new BoxError(BoxError.BAD_FIELD, 'Invalid zoneName');
-        if (zoneName.endsWith('.')) throw new BoxError(BoxError.BAD_FIELD, 'Invalid zoneName');
+        if (!tld.isValid(data.zoneName)) throw new BoxError(BoxError.BAD_FIELD, 'Invalid zoneName');
+        if (data.zoneName.endsWith('.')) throw new BoxError(BoxError.BAD_FIELD, 'Invalid zoneName');
         zoneName = data.zoneName;
     } else {
         zoneName = tld.getDomain(domain) || domain;
@@ -214,7 +214,7 @@ async function setConfig(domain, data, auditSource) {
     const domainObject = await get(domain);
     let zoneName;
     if (data.zoneName) {
-        if (!tld.isValid(zoneName)) throw new BoxError(BoxError.BAD_FIELD, 'Invalid zoneName');
+        if (!tld.isValid(data.zoneName)) throw new BoxError(BoxError.BAD_FIELD, 'Invalid zoneName');
         zoneName = data.zoneName;
     } else {
         zoneName = domainObject.zoneName;