diff --git a/store/src/main/java/org/apache/rocketmq/store/logfile/DefaultMappedFile.java b/store/src/main/java/org/apache/rocketmq/store/logfile/DefaultMappedFile.java
index 7c4e5e025a7..7a7b5f84368 100644
--- a/store/src/main/java/org/apache/rocketmq/store/logfile/DefaultMappedFile.java
+++ b/store/src/main/java/org/apache/rocketmq/store/logfile/DefaultMappedFile.java
@@ -389,6 +389,9 @@ public AppendMessageResult appendMessagesInner(final MessageExt messageExt, fina
                         int endpos = currentPos + msgLen;
                         // alignment end position
                         int extraAppendSize = UNSAFE_PAGE_SIZE - endpos % UNSAFE_PAGE_SIZE;
+                        if (extraAppendSize == UNSAFE_PAGE_SIZE) {
+                            extraAppendSize = 0;
+                        }
                         int actualAppendSize = msgLen + extraAppendSize;
 
                         this.fileChannel.position(currentPos);