diff --git a/sklearn/preprocessing/_data.py b/sklearn/preprocessing/_data.py
index b38bc6940b140..5670c520a77c9 100644
--- a/sklearn/preprocessing/_data.py
+++ b/sklearn/preprocessing/_data.py
@@ -2879,7 +2879,7 @@ def quantile_transform(
         input is already a numpy array). If True, a copy of `X` is transformed,
         leaving the original `X` unchanged
 
-        ..versionchanged:: 0.23
+        .. versionchanged:: 0.23
             The default value of `copy` changed from False to True in 0.23.
 
     Returns