diff --git a/store/src/main/java/org/apache/rocketmq/store/config/MessageStoreConfig.java b/store/src/main/java/org/apache/rocketmq/store/config/MessageStoreConfig.java
index 2543e96d05790a89ac9bdd87461239c66aeb9809..7891f71067a26e4118efde7c79a0b7de7279b8be 100644
--- a/store/src/main/java/org/apache/rocketmq/store/config/MessageStoreConfig.java
+++ b/store/src/main/java/org/apache/rocketmq/store/config/MessageStoreConfig.java
@@ -80,7 +80,7 @@ public class MessageStoreConfig {
     private int fileReservedTime = 72;
     // Flow control for ConsumeQueue
     private int putMsgIndexHightWater = 600000;
-    // The maximum size of a single log file,default is 512K
+    // The maximum size of message,default is 4M
     private int maxMessageSize = 1024 * 1024 * 4;
     // Whether check the CRC32 of the records consumed.
     // This ensures no on-the-wire or on-disk corruption to the messages occurred.