diff --git a/lib/util.js b/lib/util.js
index e9a4a69..169d061 100644
--- a/lib/util.js
+++ b/lib/util.js
@@ -81,9 +81,7 @@ exports.checkArgs = (searchString, options = {}) => {
   // Unlink requestOptions
   obj.requestOptions = Object.assign({}, options.requestOptions);
   // Unlink requestOptions#headers
-  if (obj.requestOptions.headers) {
-    obj.requestOptions.headers = clone(obj.requestOptions.headers);
-  }
+  obj.requestOptions.headers = obj.requestOptions.headers ? clone(obj.requestOptions.headers) : {};
   const cookie = getPropInsensitive(obj.requestOptions.headers, 'cookie');
   if (!cookie) {
     setPropInsensitive(obj.requestOptions.headers, 'cookie', CONSENT_COOKIE);