diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/bucket/FileIOEngine.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/bucket/FileIOEngine.java
index e6943a7de8a5..e0dfb7f79be2 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/bucket/FileIOEngine.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/bucket/FileIOEngine.java
@@ -371,7 +371,7 @@ public byte[] calculateChecksum()
       }
     }
     MessageDigest messageDigest = MessageDigest.getInstance(algorithmName);
-    messageDigest.update(sb.toString().getBytes());
+    messageDigest.update(Bytes.toBytes(sb.toString()));
     return messageDigest.digest();
   }