diff --git a/include/ndn-cpp/security/identity/osx-private-key-storage.hpp b/include/ndn-cpp/security/identity/osx-private-key-storage.hpp
index 729bf9e..2e1c977 100644
--- a/include/ndn-cpp/security/identity/osx-private-key-storage.hpp
+++ b/include/ndn-cpp/security/identity/osx-private-key-storage.hpp
@@ -200,6 +200,6 @@
   
 }
 
-#endif NDN_CPP_HAVE_OSX_SECURITY
+#endif // NDN_CPP_HAVE_OSX_SECURITY
 
 #endif