diff --git a/daemon/fw/scope-prefix.cpp b/daemon/fw/scope-prefix.cpp
index 984d19c..7f6043b 100644
--- a/daemon/fw/scope-prefix.cpp
+++ b/daemon/fw/scope-prefix.cpp
@@ -1,6 +1,6 @@
 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
 /*
- * Copyright (c) 2014-2019,  Regents of the University of California,
+ * Copyright (c) 2014-2022,  Regents of the University of California,
  *                           Arizona Board of Regents,
  *                           Colorado State University,
  *                           University Pierre & Marie Curie, Sorbonne University,
@@ -25,11 +25,9 @@
 
 #include "scope-prefix.hpp"
 
-namespace nfd {
-namespace scope_prefix {
+namespace nfd::scope_prefix {
 
 const Name LOCALHOST("ndn:/localhost");
 const Name LOCALHOP("ndn:/localhop");
 
-} // namespace scope_prefix
-} // namespace nfd
+} // namespace nfd::scope_prefix