diff --git a/Objects/bytearrayobject.c b/Objects/bytearrayobject.c
index 03604633a01..4ac0ae75aed 100644
--- a/Objects/bytearrayobject.c
+++ b/Objects/bytearrayobject.c
@@ -2649,7 +2649,7 @@ bytearray_join(PyByteArrayObject *self, PyObject *it)
 }
 
 PyDoc_STRVAR(splitlines__doc__,
-"B.splitlines([keepends]) -> list of lines\n\
+"B.splitlines(keepends=False) -> list of lines\n\
 \n\
 Return a list of the lines in B, breaking at line boundaries.\n\
 Line breaks are not included in the resulting list unless keepends\n\
diff --git a/Objects/stringobject.c b/Objects/stringobject.c
index ab377dd7a2d..fd2f63001d9 100644
--- a/Objects/stringobject.c
+++ b/Objects/stringobject.c
@@ -3545,7 +3545,7 @@ string_istitle(PyStringObject *self, PyObject *uncased)
 
 
 PyDoc_STRVAR(splitlines__doc__,
-"S.splitlines([keepends]) -> list of strings\n\
+"S.splitlines(keepends=False) -> list of strings\n\
 \n\
 Return a list of the lines in S, breaking at line boundaries.\n\
 Line breaks are not included in the resulting list unless keepends\n\
diff --git a/Objects/unicodeobject.c b/Objects/unicodeobject.c
index 3dfbea1cc52..7af7b50a946 100644
--- a/Objects/unicodeobject.c
+++ b/Objects/unicodeobject.c
@@ -7521,7 +7521,7 @@ unicode_rsplit(PyUnicodeObject *self, PyObject *args)
 }
 
 PyDoc_STRVAR(splitlines__doc__,
-             "S.splitlines([keepends]) -> list of strings\n\
+             "S.splitlines(keepends=False) -> list of strings\n\
 \n\
 Return a list of the lines in S, breaking at line boundaries.\n\
 Line breaks are not included in the resulting list unless keepends\n\