diff --git a/java/src/main/java/org/msgpack/MessagePack.java b/java/src/main/java/org/msgpack/MessagePack.java
index 449f8a09..e4bc6279 100644
--- a/java/src/main/java/org/msgpack/MessagePack.java
+++ b/java/src/main/java/org/msgpack/MessagePack.java
@@ -56,7 +56,7 @@ public class MessagePack {
 	}
 
 
-	public static MessagePackObject unpack(byte[] buffer) throws IOException {
+	public static MessagePackObject unpack(byte[] buffer) throws MessageTypeException {
 		Unpacker pac = new Unpacker();
 		pac.wrap(buffer);
 		try {