diff --git a/tools/dig.cpp b/tools/dig.cpp
index ef6bbf1..28b3ec9 100644
--- a/tools/dig.cpp
+++ b/tools/dig.cpp
@@ -21,6 +21,8 @@
 #include "boost/program_options.hpp"
 #include "boost/filesystem.hpp"
 
+#include "version.hpp"
+
 using namespace ndn;
 using namespace ndn::ndns;
 using namespace std;
@@ -147,4 +149,3 @@
   }
 
 }
-