diff --git a/ndn-cpp/transport/transport.hpp b/ndn-cpp/transport/transport.hpp
index de2b7e5..c465aa4 100644
--- a/ndn-cpp/transport/transport.hpp
+++ b/ndn-cpp/transport/transport.hpp
@@ -4,7 +4,7 @@
  */
 
 #ifndef NDN_TRANSPORT_HPP
-#define	NDN_TRANSPORT_HPP
+#define NDN_TRANSPORT_HPP
 
 #include <vector>