diff --git a/pandas/core/strings.py b/pandas/core/strings.py
index c57d7a9362490..4814e78ee6546 100644
--- a/pandas/core/strings.py
+++ b/pandas/core/strings.py
@@ -611,11 +611,12 @@ def str_extract(arr, pat, flags=0, expand=None):
     flags : int, default 0 (no flags)
         re module flags, e.g. re.IGNORECASE
 
-    .. versionadded:: 0.18.0
     expand : bool, default False
         * If True, return DataFrame.
         * If False, return Series/Index/DataFrame.
 
+        .. versionadded:: 0.18.0
+
     Returns
     -------
     DataFrame with one row for each subject string, and one column for