diff --git a/daemon/fw/access-strategy.cpp b/daemon/fw/access-strategy.cpp
index 688867f..0070a3e 100644
--- a/daemon/fw/access-strategy.cpp
+++ b/daemon/fw/access-strategy.cpp
@@ -1,6 +1,6 @@
 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
 /*
- * Copyright (c) 2014-2023,  Regents of the University of California,
+ * Copyright (c) 2014-2024,  Regents of the University of California,
  *                           Arizona Board of Regents,
  *                           Colorado State University,
  *                           University Pierre & Marie Curie, Sorbonne University,
@@ -43,7 +43,8 @@
     NDN_THROW(std::invalid_argument("AccessStrategy does not accept parameters"));
   }
   if (parsed.version && *parsed.version != getStrategyName()[-1].toVersion()) {
-    NDN_THROW(std::invalid_argument("AccessStrategy does not support version " + to_string(*parsed.version)));
+    NDN_THROW(std::invalid_argument("AccessStrategy does not support version " +
+                                    std::to_string(*parsed.version)));
   }
   this->setInstanceName(makeInstanceName(name, getStrategyName()));
 }