diff --git a/asterixdb/asterix-external-data/src/main/java/org/apache/asterix/external/library/msgpack/MsgPackAccessors.java b/asterixdb/asterix-external-data/src/main/java/org/apache/asterix/external/library/msgpack/MsgPackAccessors.java
index a90a183..6efbb6e 100644
--- a/asterixdb/asterix-external-data/src/main/java/org/apache/asterix/external/library/msgpack/MsgPackAccessors.java
+++ b/asterixdb/asterix-external-data/src/main/java/org/apache/asterix/external/library/msgpack/MsgPackAccessors.java
@@ -124,7 +124,7 @@
             int s = pointable.getStartOffset();
             int i = AInt32SerializerDeserializer.getInt(b, s + 1);
             out.writeByte(INT32);
-            out.writeByte(i);
+            out.writeInt(i);
             return null;
         }
     }