diff --git a/src/main/cpp/net/eagle0/shardok/library/PercentileRollOdds.hpp b/src/main/cpp/net/eagle0/shardok/library/PercentileRollOdds.hpp
index b5d20b4149..32a290acca 100644
--- a/src/main/cpp/net/eagle0/shardok/library/PercentileRollOdds.hpp
+++ b/src/main/cpp/net/eagle0/shardok/library/PercentileRollOdds.hpp
@@ -22,13 +22,13 @@ namespace shardok {
 using PercentileRollOdds = net::eagle0::shardok::storage::Odds;
 using OtherFactor = net::eagle0::shardok::storage::Odds_OtherFactor;
 
-double BonusFromStat(double stat);
+[[nodiscard]] double BonusFromStat(double stat);
 
-int16_t AverageBonusFromStats(const std::vector<double> &stats);
+[[nodiscard]] int16_t AverageBonusFromStats(const std::vector<double> &stats);
 
-OtherFactor MakeOtherFactor(int value, const std::string &id);
+[[nodiscard]] OtherFactor MakeOtherFactor(int value, const std::string &id);
 
-PercentileRollOdds MakeOdds(
+[[nodiscard]] PercentileRollOdds MakeOdds(
         int base = 0,
         int terr = 0,
         int weath = 0,
@@ -36,7 +36,7 @@ PercentileRollOdds MakeOdds(
         int statF = 0,
         std::span<const OtherFactor> others = {});
 
-PercentileRollOdds MakeOdds(
+[[nodiscard]] PercentileRollOdds MakeOdds(
         int base,
         int terr,
         int weath,
@@ -44,11 +44,11 @@ PercentileRollOdds MakeOdds(
         const std::vector<double> &stats,
         std::span<const OtherFactor> others = {});
 
-int16_t GetTotalOdds(const PercentileRollOdds &odds);
+[[nodiscard]] int16_t GetTotalOdds(const PercentileRollOdds &odds);
 
-bool PercentileRollSucceeds(const PercentileRollOdds &odds, double roll);
+[[nodiscard]] bool PercentileRollSucceeds(const PercentileRollOdds &odds, double roll);
 
-int16_t GetSuccessChance(const PercentileRollOdds &odds);
+[[nodiscard]] int16_t GetSuccessChance(const PercentileRollOdds &odds);
 }  // namespace shardok
 
 #endif  // EAGLE0_SHARDOK_LIBRARY_PERCENTILE_ROLL_ODDS_HPP