diff --git a/include/ndn-cpp/security/encryption/encryption-manager.hpp b/include/ndn-cpp/security/encryption/encryption-manager.hpp
index 88a69c8..e6d29e9 100644
--- a/include/ndn-cpp/security/encryption/encryption-manager.hpp
+++ b/include/ndn-cpp/security/encryption/encryption-manager.hpp
@@ -6,7 +6,7 @@
  */
 
 #ifndef NDN_ENCRYPTION_MANAGER_HPP
-#define	NDN_ENCRYPTION_MANAGER_HPP
+#define NDN_ENCRYPTION_MANAGER_HPP
 
 #include "../../name.hpp"
 #include "../security-common.hpp"