diff --git a/src/security/conf/key-locator-checker.hpp b/src/security/conf/key-locator-checker.hpp
index 7a9ff0b..04f43e0 100644
--- a/src/security/conf/key-locator-checker.hpp
+++ b/src/security/conf/key-locator-checker.hpp
@@ -1,6 +1,6 @@
 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
 /**
- * Copyright (c) 2013-2015 Regents of the University of California.
+ * Copyright (c) 2013-2017 Regents of the University of California.
  *
  * This file is part of ndn-cxx library (NDN C++ library with eXperimental eXtensions).
  *
@@ -75,13 +75,13 @@
         const KeyLocator& keyLocator,
         std::string& failInfo)
   {
-    if (interest.getName().size() < signed_interest::MIN_LENGTH)
+    if (interest.getName().size() < command_interest::MIN_SIZE)
       {
         failInfo = "No Signature";
         return false;
       }
 
-    Name signedName = interest.getName().getPrefix(-signed_interest::MIN_LENGTH);
+    Name signedName = interest.getName().getPrefix(-command_interest::MIN_SIZE);
     return check(signedName, keyLocator, failInfo);
   }