diff --git a/src/main/java/org/msgpack/hadoop/hive/udf/GenericUDTFMessagePackArray.java b/src/main/java/org/msgpack/hadoop/hive/udf/GenericUDTFMessagePackArray.java
index 92e54c6..c8a92fd 100644
--- a/src/main/java/org/msgpack/hadoop/hive/udf/GenericUDTFMessagePackArray.java
+++ b/src/main/java/org/msgpack/hadoop/hive/udf/GenericUDTFMessagePackArray.java
@@ -141,7 +141,7 @@ public void process(Object[] o) throws HiveException {
             for (int i = 0; i < numCols; ++i) {
                 MessagePackObject obj = null;
                 int index = indexes[i];
-                if(array.size() > index && index > 0) {
+                if(array.size() > index && index >= 0) {
                     obj = array.get(indexes[i]);
                 }
                 if(obj == null) {