diff --git a/src/util.hpp b/src/util.hpp
index 1bb0c71..61d3a17 100644
--- a/src/util.hpp
+++ b/src/util.hpp
@@ -37,6 +37,7 @@
 #include <iostream>
 #include <fstream>
 #include <chrono>
+#include <utility>
 
 #define RANGELESS_ENABLE_TSV 1
 #include <ext/fn.hpp>