diff --git a/asterix-om/src/main/java/edu/uci/ics/asterix/builders/AbstractListBuilder.java b/asterix-om/src/main/java/edu/uci/ics/asterix/builders/AbstractListBuilder.java
index c067507..2e852d5 100644
--- a/asterix-om/src/main/java/edu/uci/ics/asterix/builders/AbstractListBuilder.java
+++ b/asterix-om/src/main/java/edu/uci/ics/asterix/builders/AbstractListBuilder.java
@@ -77,7 +77,7 @@
     public void addItem(IValueReference item) throws HyracksDataException {
         try {
             if (!fixedSize && (item.getByteArray()[0] != serNullTypeTag || itemTypeTag == ATypeTag.ANY))
-                this.offsets.add((short) outputStorage.getLength());
+                this.offsets.add(outputStorage.getLength());
             if (itemTypeTag == ATypeTag.ANY
                     || (itemTypeTag == ATypeTag.NULL && item.getByteArray()[0] == serNullTypeTag)) {
                 this.numberOfItems++;
diff --git a/asterix-om/src/main/java/edu/uci/ics/asterix/builders/OrderedListBuilder.java b/asterix-om/src/main/java/edu/uci/ics/asterix/builders/OrderedListBuilder.java
index f32826b..bd3a8f4 100644
--- a/asterix-om/src/main/java/edu/uci/ics/asterix/builders/OrderedListBuilder.java
+++ b/asterix-om/src/main/java/edu/uci/ics/asterix/builders/OrderedListBuilder.java
@@ -27,7 +27,7 @@
 
     public void addItem(IToken token) throws IOException {
         if (!fixedSize) {
-            offsets.add((short) outputStorage.getLength());
+            offsets.add(outputStorage.getLength());
         }
         numberOfItems++;
         token.serializeToken(outputStorage);