diff --git a/tools/ndncert-ca-server.cpp b/tools/ndncert-ca-server.cpp
index 0786654..a3e1c1f 100644
--- a/tools/ndncert-ca-server.cpp
+++ b/tools/ndncert-ca-server.cpp
@@ -25,9 +25,6 @@
 #include <ndn-cxx/security/key-chain.hpp>
 
 #include <boost/asio/ip/tcp.hpp>
-#if BOOST_VERSION < 106700
-#include <boost/date_time/posix_time/posix_time_duration.hpp>
-#endif
 #include <boost/program_options/options_description.hpp>
 #include <boost/program_options/parsers.hpp>
 #include <boost/program_options/variables_map.hpp>
@@ -98,6 +95,9 @@
           }
       });
   }
+  else {
+    
+  }
 
   face.processEvents();
   return 0;