diff --git a/src/data.hpp b/src/data.hpp
index 170cad2..fec8658 100644
--- a/src/data.hpp
+++ b/src/data.hpp
@@ -33,15 +33,17 @@
 
 namespace ndn {
 
+/** @brief represents a Data packet
+ */
 class Data : public enable_shared_from_this<Data>
 {
 public:
-  class Error : public std::runtime_error
+  class Error : public tlv::Error
   {
   public:
     explicit
     Error(const std::string& what)
-      : std::runtime_error(what)
+      : tlv::Error(what)
     {
     }
   };