diff --git a/src/lib/isURL.js b/src/lib/isURL.js
index 254297377..7f6e0ba5f 100644
--- a/src/lib/isURL.js
+++ b/src/lib/isURL.js
@@ -145,15 +145,15 @@ export default function isURL(url, options) {
     return false;
   }
 
+  if (options.host_whitelist) {
+    return checkHost(host, options.host_whitelist);
+  }
   if (!isIP(host) && !isFQDN(host, options) && (!ipv6 || !isIP(ipv6, 6))) {
     return false;
   }
 
   host = host || ipv6;
 
-  if (options.host_whitelist && !checkHost(host, options.host_whitelist)) {
-    return false;
-  }
   if (options.host_blacklist && checkHost(host, options.host_blacklist)) {
     return false;
   }