diff --git a/card_game/src/lib.rs b/card_game/src/lib.rs
index 76eaf4c..666cf12 100644
--- a/card_game/src/lib.rs
+++ b/card_game/src/lib.rs
@@ -437,7 +437,7 @@ where
 	type Stats = SessionStats<G::Stats>;
 	type Config = SessionConfig<G::Config>;
 	type Instruction = SessionInstruction<G::Instruction>;
-	fn score(&self, stats: &Self::Stats, config: &Self::Config) -> i32 {
+	fn score(&self, stats: &Self::Stats, config: &Self::Config) -> Self::Score {
 		self.state.score(&stats.inner, &config.inner) + stats.undos as i32 * config.undo_penalty
 	}
 	fn possible_instructions(