diff --git a/src/bioutils/normalize.py b/src/bioutils/normalize.py
index 9772ddb..7e33c20 100644
--- a/src/bioutils/normalize.py
+++ b/src/bioutils/normalize.py
@@ -52,7 +52,7 @@ def normalize(
             Must be provided if sequence doesn't support ``__len__``. Defaults to ``(0, len(sequence))``.
         mode (NormalizationMode Enum or string, optional): A NormalizationMode Enum or the corresponding string.
             Defaults to ``EXPAND``. Set to None to skip shuffling. Does not affect trimming or anchoring.
-        anchor (int, optional): number of flanking residues left and right. Defaults to ``0``.
+        anchor_length (int, optional): number of flanking residues left and right. Defaults to ``0``.
         trim (bool): indicates whether to trim the common prefix and suffix of alleles. Defaults to True.
             Set to False to skip trimming. Does not affect shuffling or anchoring.