diff --git a/pandas/core/strings.py b/pandas/core/strings.py
index 3be9c5fcdfb26..c4bdbaff1649c 100644
--- a/pandas/core/strings.py
+++ b/pandas/core/strings.py
@@ -572,7 +572,7 @@ def str_replace(arr, pat, repl, n=-1, case=None, flags=0, regex=True):
     r"""
     Replace occurrences of pattern/regex in the Series/Index with
     some other string. Equivalent to :meth:`str.replace` or
-    :func:`re.sub`.
+    :func:`re.sub`, depending on the regex value.
 
     Parameters
     ----------