diff --git a/ultraplot/ticker.py b/ultraplot/ticker.py
index 4dfa7bfc7..ad1da9519 100644
--- a/ultraplot/ticker.py
+++ b/ultraplot/ticker.py
@@ -64,7 +64,7 @@
     when `zerotrim` is ``True`` and ``2`` otherwise.
 """
 _zerotrim_docstring = """
-zerotrim : bool, default: :rc:`format.zerotrim`
+zerotrim : bool, default: :rc:`formatter.zerotrim`
     Whether to trim trailing decimal zeros.
 """
 _auto_docstring = """