diff --git a/io/README.md b/io/README.md
index 72b3f86..3772a93 100644
--- a/io/README.md
+++ b/io/README.md
@@ -3,7 +3,7 @@
 ## LineReader
 ### Usage
 ```go
-lr := NewLineReader(reader, 4098 /* blockSize */)
+lr := NewLineReader(reader, 4096 /* blockSize */)
 line := [12288]byte{}
 
 var err error