diff --git a/PySDM/backends/numba/impl/_algorithmic_methods.py b/PySDM/backends/numba/impl/_algorithmic_methods.py
index 7695c4f83..4ab3fe66a 100644
--- a/PySDM/backends/numba/impl/_algorithmic_methods.py
+++ b/PySDM/backends/numba/impl/_algorithmic_methods.py
@@ -43,7 +43,7 @@ def adaptive_sdm_gamma_body(gamma, idx, length, n, cell_id, dt_left, dt, dt_rang
         dt_todo = np.empty_like(dt_left)
         for cid in numba.prange(len(dt_todo)):
             dt_todo[cid] = min(dt_left[cid], dt_range[1])
-        for i in range(length // 2):  # TODO #401
+        for i in range(length // 2):  # TODO #571
             if gamma[i] == 0:
                 continue
             j, k = pair_indices(i, idx, is_first_in_pair)