diff --git a/coding/move_to_front.hpp b/coding/move_to_front.hpp
index dc81cb4a5d..a22aabb31b 100644
--- a/coding/move_to_front.hpp
+++ b/coding/move_to_front.hpp
@@ -3,6 +3,7 @@
 #include <array>
 #include <cstdint>
 #include <limits>
+#include <cstddef>
 
 namespace coding
 {