diff --git a/ndn-cpp/transport/Transport.cpp b/ndn-cpp/transport/Transport.cpp
index 950b1cb..84a4e02 100644
--- a/ndn-cpp/transport/Transport.cpp
+++ b/ndn-cpp/transport/Transport.cpp
@@ -10,7 +10,7 @@
 
 namespace ndn {
 
-void Transport::connect(char *host, unsigned short port) 
+void Transport::connect(const char *host, unsigned short port) 
 {
   throw logic_error("unimplemented");
 }