diff --git a/lib/_stream_readable.js b/lib/_stream_readable.js
index 11069985a4d40a..644c4ffa67b04f 100644
--- a/lib/_stream_readable.js
+++ b/lib/_stream_readable.js
@@ -190,7 +190,7 @@ Readable.prototype.setEncoding = function(enc) {
   return this;
 };
 
-// Don't raise the hwm > 128MB
+// Don't raise the hwm > 8MB
 const MAX_HWM = 0x800000;
 function roundUpToNextPowerOf2(n) {
   if (n >= MAX_HWM) {