diff --git a/mvt.hpp b/mvt.hpp
index e00dc703..e44a632a 100644
--- a/mvt.hpp
+++ b/mvt.hpp
@@ -9,6 +9,7 @@
 #include <vector>
 #include <optional>
 #include <memory>
+#include <cmath>
 
 #include "errors.hpp"
 #include "text.hpp"