diff --git a/lib/buffer.js b/lib/buffer.js
index 784546d6a0bf71..b5b1e9650de982 100644
--- a/lib/buffer.js
+++ b/lib/buffer.js
@@ -170,7 +170,7 @@ Buffer.isEncoding = function(encoding) {
 
 Buffer.concat = function(list, length) {
   if (!Array.isArray(list))
-    throw new TypeError('Usage: Buffer.concat(list[, length])');
+    throw new TypeError('list argument must be an Array of Buffers.');
 
   if (length === undefined) {
     length = 0;