diff --git a/cassandra/cqltypes.py b/cassandra/cqltypes.py
index e36c48563c..114be3f405 100644
--- a/cassandra/cqltypes.py
+++ b/cassandra/cqltypes.py
@@ -730,6 +730,10 @@ def deserialize(byts, protocol_version):
     def serialize(byts, protocol_version):
         return int16_pack(byts)
 
+    @classmethod
+    def serial_size(cls):
+        return 2
+
 class TimeType(_CassandraType):
     typename = 'time'
     # Time should be a fixed size 8 byte type but Cassandra 5.0 code marks it as