diff --git a/ndn-cpp/encoding/binary-xml-encoder.hpp b/ndn-cpp/encoding/binary-xml-encoder.hpp
index 3bf1f45..6373466 100644
--- a/ndn-cpp/encoding/binary-xml-encoder.hpp
+++ b/ndn-cpp/encoding/binary-xml-encoder.hpp
@@ -4,7 +4,7 @@
  */
 
 #ifndef NDN_BINARYXMLENCODER_HPP
-#define	NDN_BINARYXMLENCODER_HPP
+#define NDN_BINARYXMLENCODER_HPP
 
 #include <vector>
 #include "../common.hpp"