diff --git a/src/lib/hash-standard.hpp b/src/lib/hash-standard.hpp
index af022da7d..bb307aed1 100644
--- a/src/lib/hash-standard.hpp
+++ b/src/lib/hash-standard.hpp
@@ -72,6 +72,7 @@
 
 
 #include <cstddef>
+#include <utility>
 #include <boost/utility/enable_if.hpp>