diff --git a/lib/http/base.js b/lib/http/base.js
index cb463a1c..677695aa 100644
--- a/lib/http/base.js
+++ b/lib/http/base.js
@@ -329,8 +329,8 @@ HTTPBase.prototype.parseBody = async function parseBody(req, options) {
   switch (type) {
     case 'json':
       body = JSON.parse(data);
-      if (!body || typeof body !== 'object' || Array.isArray(body))
-        throw new Error('JSON body must be an object.');
+      if (!body || !(typeof body === 'object' || Array.isArray(body)))
+        throw new Error('JSON body must be an object or array.');
       break;
     case 'form':
       body = parsePairs(data, options.keyLimit);