diff --git a/core/src/score.rs b/core/src/score.rs
index 44d0478..3528861 100644
--- a/core/src/score.rs
+++ b/core/src/score.rs
@@ -23,7 +23,7 @@ impl Score {
     ///
     /// ```
     /// use chessfriend_core::score::Score;
-    /// assert_eq!(!Score::MIN, Score::MAX);
+    /// assert_eq!(-Score::MIN, Score::MAX);
     /// ```
     ///
     pub const MIN: Score = Score(Value::MIN + 1);