diff --git a/lib/adapters/http.js b/lib/adapters/http.js
index ce9137f..69e8e74 100644
--- a/lib/adapters/http.js
+++ b/lib/adapters/http.js
@@ -128,7 +128,7 @@ module.exports = function httpAdapter(config) {
       transport = isHttps ? httpsFollow : httpFollow;
     }
 
-    if (config.maxContentLength && maxBodyLength > -1) {
+    if (config.maxContentLength && config.maxContentLength > -1) {
       options.maxBodyLength = config.maxContentLength;
     }