diff --git a/README.md b/README.md
index fd1c6f22..d6f7da51 100644
--- a/README.md
+++ b/README.md
@@ -49,7 +49,7 @@ Here is an async HTTP server built with just the event loop.
                 fclose($conn);
                 $loop->removeStream($conn);
             } else {
-                $data = substr($data, 0, $written);
+                $data = substr($data, $written);
             }
         });
     });