diff --git a/src/config.hpp b/src/config.hpp
index 2b87f8a8e03d..fff9e2e093ca 100644
--- a/src/config.hpp
+++ b/src/config.hpp
@@ -38,7 +38,6 @@
 #include <utility>
 #include <vector>
 
-#include <boost/blank.hpp>
 #include <boost/exception/exception.hpp>
 #include <boost/variant/apply_visitor.hpp>
 #include <boost/variant/variant.hpp>