diff --git a/game_state.h b/game_state.h
index be7541e..7d7b424 100644
--- a/game_state.h
+++ b/game_state.h
@@ -73,11 +73,11 @@ constexpr Card y4 = {1, 4};
  * - Number of clues
  */
 
-template <suit_t num_suits>
+template <size_t num_suits>
 using Stacks = std::array<rank_t, num_suits>;
 
-template <suit_t num_suits>
-std::ostream &operator<<(std::ostream &os, const Stacks<num_suits> &stacks);
+template <size_t num_suits>
+std::ostream& operator<<(std::ostream &os, const Stacks<num_suits> &stacks);
 
 struct CardMultiplicity {
   Card card;
diff --git a/game_state.hpp b/game_state.hpp
index a0a3cfd..298ab2c 100644
--- a/game_state.hpp
+++ b/game_state.hpp
@@ -27,8 +27,8 @@ namespace Hanabi {
         return os;
     }
 
-    template<suit_t num_suits>
-    std::ostream &operator<<(std::ostream &os, const Stacks<num_suits> &stacks) {
+    template<size_t num_suits>
+    std::ostream& operator<<(std::ostream &os, const Stacks<num_suits> &stacks) {
         for (size_t i = 0; i < stacks.size() - 1; i++) {
             os << starting_card_rank - stacks[i] << ", ";
         }
@@ -189,7 +189,7 @@ namespace Hanabi {
 
     template<suit_t num_suits, player_t num_players, hand_index_t hand_size>
     void HanabiState<num_suits, num_players, hand_size>::print(std::ostream &os) const {
-//        os << "Stacks: " << _stacks << " (score " << +_score << ")";
+        os << "Stacks: " << _stacks << " (score " << +_score << ")";
         os << ", clues: " << +_num_clues << ", turn: " << +_turn << std::endl;
         os << "Draw pile: ";
         for (const auto &[card, mul]: _draw_pile) {