diff --git a/ndn-cpp/encoding/WireFormat.cpp b/ndn-cpp/encoding/WireFormat.cpp
index 3217fe1..7e784a3 100644
--- a/ndn-cpp/encoding/WireFormat.cpp
+++ b/ndn-cpp/encoding/WireFormat.cpp
@@ -28,4 +28,13 @@
   throw logic_error("unimplemented");
 }
 
+void WireFormat::encodeContentObject(const ContentObject &contentObject, vector<unsigned char> &output) 
+{
+  throw logic_error("unimplemented");
+}
+void WireFormat::decodeContentObject(ContentObject &contentObject, const unsigned char *input, unsigned int inputLength) 
+{
+  throw logic_error("unimplemented");
+}
+
 }