diff --git a/numerics/approximation_body.hpp b/numerics/approximation_body.hpp
index 2a4540757a..6e9f73146c 100644
--- a/numerics/approximation_body.hpp
+++ b/numerics/approximation_body.hpp
@@ -3,6 +3,7 @@
 #include "numerics/approximation.hpp"
 
 #include <algorithm>
+#include <utility>
 #include <vector>
 
 #include "base/tags.hpp"