diff --git a/user_guide_src/source/changelogs/v4.5.0.rst b/user_guide_src/source/changelogs/v4.5.0.rst
index 2b6fc7299231..d8dbf5c4294f 100644
--- a/user_guide_src/source/changelogs/v4.5.0.rst
+++ b/user_guide_src/source/changelogs/v4.5.0.rst
@@ -57,6 +57,8 @@ Interface Changes
     or implemented these interfaces, all these changes are backward compatible
     and require no intervention.
 
+- **ResponseInterface:** The default value of the third parameter ``$expire`` of
+  the ``ResponseInterface::setCookie()`` has been fixed from ``''`` to ``0``.
 - **Logger:** The `psr/log <https://packagist.org/packages/psr/log>`_ package has
   been upgraded to v2.0.0.
 
@@ -65,6 +67,15 @@ Interface Changes
 Method Signature Changes
 ========================
 
+Setting Cookies
+---------------
+
+The third parameter ``$expire`` in :php:func:`set_cookie()` and
+:php:meth:`CodeIgniter\\HTTP\\Response::setCookie()` has been fixed.
+
+The type has been changed from ``string`` to ``int``, and the default value has
+been changed from ``''`` to  ``0``.
+
 FileLocatorInterface
 --------------------
 
diff --git a/user_guide_src/source/helpers/cookie_helper.rst b/user_guide_src/source/helpers/cookie_helper.rst
index 10002e2a9eb5..296f1a3dd471 100755
--- a/user_guide_src/source/helpers/cookie_helper.rst
+++ b/user_guide_src/source/helpers/cookie_helper.rst
@@ -21,7 +21,7 @@ Available Functions
 
 The following functions are available:
 
-.. php:function:: set_cookie($name[, $value = ''[, $expire = ''[, $domain = ''[, $path = '/'[, $prefix = ''[, $secure = false[, $httpOnly = false[, $sameSite = '']]]]]]]])
+.. php:function:: set_cookie($name[, $value = ''[, $expire = 0[, $domain = ''[, $path = '/'[, $prefix = ''[, $secure = false[, $httpOnly = false[, $sameSite = '']]]]]]]])
 
     :param    array|Cookie|string    $name: Cookie name *or* associative array of all of the parameters available to this function *or* an instance of ``CodeIgniter\Cookie\Cookie``
     :param    string    $value: Cookie value
diff --git a/user_guide_src/source/outgoing/response.rst b/user_guide_src/source/outgoing/response.rst
index 078d9d11042a..8d9acb39d126 100644
--- a/user_guide_src/source/outgoing/response.rst
+++ b/user_guide_src/source/outgoing/response.rst
@@ -453,7 +453,7 @@ The methods provided by the parent class that are available are:
         followed by the response body. For the main application response, you do not need to call
         this as it is handled automatically by CodeIgniter.
 
-    .. php:method:: setCookie($name = ''[, $value = ''[, $expire = ''[, $domain = ''[, $path = '/'[, $prefix = ''[, $secure = false[, $httponly = false[, $samesite = null]]]]]]]])
+    .. php:method:: setCookie($name = ''[, $value = ''[, $expire = 0[, $domain = ''[, $path = '/'[, $prefix = ''[, $secure = false[, $httponly = false[, $samesite = null]]]]]]]])
 
         :param array|Cookie|string $name: Cookie name *or* associative array of all of the parameters available to this method *or* an instance of ``CodeIgniter\Cookie\Cookie``
         :param string $value: Cookie value
@@ -481,7 +481,7 @@ The methods provided by the parent class that are available are:
         .. literalinclude:: response/023.php
 
         Only the ``name`` and ``value`` are required. To delete a cookie set it with the
-        ``expire`` blank.
+        ``value`` blank.
 
         The ``expire`` is set in **seconds**, which will be added to the current
         time. Do not include the time, but rather only the number of seconds
diff --git a/user_guide_src/source/outgoing/response/023.php b/user_guide_src/source/outgoing/response/023.php
index 3d0855739e96..dd3d905add0e 100644
--- a/user_guide_src/source/outgoing/response/023.php
+++ b/user_guide_src/source/outgoing/response/023.php
@@ -3,7 +3,7 @@
 $cookie = [
     'name'     => 'The Cookie Name',
     'value'    => 'The Value',
-    'expire'   => '86500',
+    'expire'   => 86500,
     'domain'   => '.some-domain.com',
     'path'     => '/',
     'prefix'   => 'myprefix_',