From cc16577d157472f7edcf50b0b1933df06a51ff10 Mon Sep 17 00:00:00 2001
From: Fang Zheng <fang.zheng@amplitude.com>
Date: Fri, 29 Dec 2023 22:56:29 -0800
Subject: [PATCH] Fix bug in ImmutableTimestampValueImpl.

---
 .../org/msgpack/value/impl/ImmutableTimestampValueImpl.java     | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/msgpack-core/src/main/java/org/msgpack/value/impl/ImmutableTimestampValueImpl.java b/msgpack-core/src/main/java/org/msgpack/value/impl/ImmutableTimestampValueImpl.java
index 227c85d0..20ebeb81 100644
--- a/msgpack-core/src/main/java/org/msgpack/value/impl/ImmutableTimestampValueImpl.java
+++ b/msgpack-core/src/main/java/org/msgpack/value/impl/ImmutableTimestampValueImpl.java
@@ -93,7 +93,7 @@ public byte[] getData()
             long sec = getEpochSecond();
             int nsec = getNano();
             if (sec >>> 34 == 0) {
-                long data64 = (nsec << 34) | sec;
+                long data64 = ((long)nsec << 34) | sec;
                 if ((data64 & 0xffffffff00000000L) == 0L) {
                     bytes = new byte[4];
                     MessageBuffer.wrap(bytes).putInt(0, (int) sec);