diff --git a/cpp/src/pieces/piece.hpp b/cpp/src/pieces/piece.hpp
index a89568e..ad61c4d 100644
--- a/cpp/src/pieces/piece.hpp
+++ b/cpp/src/pieces/piece.hpp
@@ -4,6 +4,7 @@
 
 #include <cstdint>
 #include <optional>
+#include <ostream>
 #include <vector>
 
 enum Piece : int8_t {
@@ -21,6 +22,11 @@ enum Colour : int8_t {
     Black = 16,
 };
 
+inline std::ostream& operator<<(std::ostream& os, const int8_t& i) {
+    os << std::to_string(i);
+    return os;
+}
+
 class Board;
 struct Coords;