diff --git a/lib/node/config.js b/lib/node/config.js
index 7744bbdb..68267b8d 100644
--- a/lib/node/config.js
+++ b/lib/node/config.js
@@ -489,7 +489,7 @@ Config.prototype.mb = function mb(key, fallback) {
   if (value === null)
     return fallback;
 
-  return value * 1024;
+  return value * 1024 * 1024;
 };
 
 /**