diff --git a/src/net/http/request.go b/src/net/http/request.go
index d091f3c056..cead91d3d4 100644
--- a/src/net/http/request.go
+++ b/src/net/http/request.go
@@ -1126,8 +1126,8 @@ func readRequest(b *bufio.Reader) (req *Request, err error) {
 // MaxBytesReader is similar to io.LimitReader but is intended for
 // limiting the size of incoming request bodies. In contrast to
 // io.LimitReader, MaxBytesReader's result is a ReadCloser, returns a
-// MaxBytesError for a Read beyond the limit, and closes the
-// underlying reader when its Close method is called.
+// non-nil error of type *MaxBytesError for a Read beyond the limit,
+// and closes the underlying reader when its Close method is called.
 //
 // MaxBytesReader prevents clients from accidentally or maliciously
 // sending a large request and wasting server resources. If possible,