diff --git a/ndn-cpp/transport/TcpTransport.hpp b/ndn-cpp/transport/TcpTransport.hpp
index a8a354e..a5d0ca8 100644
--- a/ndn-cpp/transport/TcpTransport.hpp
+++ b/ndn-cpp/transport/TcpTransport.hpp
@@ -18,7 +18,7 @@
     ndn_TcpTransport_init(&transport_);
   }
   
-  virtual void connect(char *host, unsigned short port);
+  virtual void connect(const char *host, unsigned short port);
   
   virtual void send(unsigned char *data, unsigned int dataLength);