diff --git a/src/wp-includes/rest-api/class-wp-rest-request.php b/src/wp-includes/rest-api/class-wp-rest-request.php
index 7c8d189906..87689a94a5 100644
--- a/src/wp-includes/rest-api/class-wp-rest-request.php
+++ b/src/wp-includes/rest-api/class-wp-rest-request.php
@@ -957,6 +957,7 @@ class WP_REST_Request implements ArrayAccess {
 	 * @param string $offset Parameter name.
 	 * @return bool Whether the parameter is set.
 	 */
+	#[ReturnTypeWillChange]
 	public function offsetExists( $offset ) {
 		$order = $this->get_parameter_order();
 
@@ -977,6 +978,7 @@ class WP_REST_Request implements ArrayAccess {
 	 * @param string $offset Parameter name.
 	 * @return mixed|null Value if set, null otherwise.
 	 */
+	#[ReturnTypeWillChange]
 	public function offsetGet( $offset ) {
 		return $this->get_param( $offset );
 	}
@@ -989,6 +991,7 @@ class WP_REST_Request implements ArrayAccess {
 	 * @param string $offset Parameter name.
 	 * @param mixed  $value  Parameter value.
 	 */
+	#[ReturnTypeWillChange]
 	public function offsetSet( $offset, $value ) {
 		$this->set_param( $offset, $value );
 	}
@@ -1000,6 +1003,7 @@ class WP_REST_Request implements ArrayAccess {
 	 *
 	 * @param string $offset Parameter name.
 	 */
+	#[ReturnTypeWillChange]
 	public function offsetUnset( $offset ) {
 		$order = $this->get_parameter_order();