diff --git a/model/ccnx-content-object-header.h b/model/ccnx-content-object-header.h
index 88887a6..f71e483 100644
--- a/model/ccnx-content-object-header.h
+++ b/model/ccnx-content-object-header.h
@@ -116,6 +116,7 @@
   virtual uint32_t Deserialize (Buffer::Iterator start);
 };
 
+class CcnxContentObjectHeaderException {};
   
 } // namespace ns3