diff --git a/include/ndn-cpp/security/certificate/certificate.hpp b/include/ndn-cpp/security/certificate/certificate.hpp
index 6d83673..270bfb0 100644
--- a/include/ndn-cpp/security/certificate/certificate.hpp
+++ b/include/ndn-cpp/security/certificate/certificate.hpp
@@ -32,7 +32,11 @@
    * Create a Certificate from the content in the data packet.
    * @param data The data packet with the content to decode.
    */
+#if 0 // TODO: Define in certificate.cpp
   Certificate(const Data& data);
+#else
+  Certificate(const Data& data) {}
+#endif
  
   /**
    * The virtual destructor.