diff --git a/benchmarks/core/utils.py b/benchmarks/core/utils.py
index ab12f10..02e7673 100644
--- a/benchmarks/core/utils.py
+++ b/benchmarks/core/utils.py
@@ -63,7 +63,7 @@ def sample(n: int) -> Iterator[int]:
     """Samples without replacement using a basic Fisher-Yates shuffle."""
     p = list(range(0, n))
     for i in range(n - 1):
-        j = i + random.randint(0, n - i)
+        j = random.randint(i, n - 1)
         tmp = p[j]
         p[j] = p[i]
         p[i] = tmp