diff --git a/src/wp-includes/class-wp-http-curl.php b/src/wp-includes/class-wp-http-curl.php
index 39b38110da..997bb3c768 100644
--- a/src/wp-includes/class-wp-http-curl.php
+++ b/src/wp-includes/class-wp-http-curl.php
@@ -15,6 +15,8 @@
  * Requires the Curl extension to be installed.
  *
  * @since 2.7.0
+ * @deprecated 6.4.0 Use WP_Http
+ * @see WP_Http
  */
 #[AllowDynamicProperties]
 class WP_Http_Curl {
diff --git a/src/wp-includes/class-wp-http-streams.php b/src/wp-includes/class-wp-http-streams.php
index f3879535f7..4ab23b813b 100644
--- a/src/wp-includes/class-wp-http-streams.php
+++ b/src/wp-includes/class-wp-http-streams.php
@@ -12,6 +12,8 @@
  *
  * @since 2.7.0
  * @since 3.7.0 Combined with the fsockopen transport and switched to `stream_socket_client()`.
+ * @deprecated 6.4.0 Use WP_Http
+ * @see WP_Http
  */
 #[AllowDynamicProperties]
 class WP_Http_Streams {
diff --git a/src/wp-includes/class-wp-http.php b/src/wp-includes/class-wp-http.php
index 056680ba40..287848456c 100644
--- a/src/wp-includes/class-wp-http.php
+++ b/src/wp-includes/class-wp-http.php
@@ -516,6 +516,8 @@ class WP_Http {
 	 * Tests which transports are capable of supporting the request.
 	 *
 	 * @since 3.2.0
+	 * @deprecated 6.4.0 Use WpOrg\Requests\Requests::get_transport_class()
+	 * @see WpOrg\Requests\Requests::get_transport_class()
 	 *
 	 * @param array  $args Request arguments.
 	 * @param string $url  URL to request.