diff --git a/confluent/schemaregistry/serializers/MessageSerializer.py b/confluent/schemaregistry/serializers/MessageSerializer.py
index 5aaec36..3019173 100644
--- a/confluent/schemaregistry/serializers/MessageSerializer.py
+++ b/confluent/schemaregistry/serializers/MessageSerializer.py
@@ -4,6 +4,7 @@
 import struct
 import sys
 
+from confluent.schemaregistry.client import ClientError
 from . import SerializerError
 
 MAGIC_BYTE = 0