diff --git a/common/network-shuffle/src/main/java/org/apache/spark/network/shuffle/protocol/PushBlockStream.java b/common/network-shuffle/src/main/java/org/apache/spark/network/shuffle/protocol/PushBlockStream.java
index b35ac33a6020b..d5e1cf2464d9e 100644
--- a/common/network-shuffle/src/main/java/org/apache/spark/network/shuffle/protocol/PushBlockStream.java
+++ b/common/network-shuffle/src/main/java/org/apache/spark/network/shuffle/protocol/PushBlockStream.java
@@ -96,7 +96,7 @@ public boolean equals(Object other) {
 
   @Override
   public int encodedLength() {
-    return Encoders.Strings.encodedLength(appId) + 20;
+    return Encoders.Strings.encodedLength(appId) + 4 + 4 + 4 + 4 + 4;
   }
 
   @Override