diff --git a/src/wp-includes/rest-api.php b/src/wp-includes/rest-api.php
index adcca17d3b..716b425e57 100644
--- a/src/wp-includes/rest-api.php
+++ b/src/wp-includes/rest-api.php
@@ -1395,7 +1395,7 @@ function rest_preload_api_request( $memo, $path ) {
 	if ( 200 === $response->status ) {
 		$server = rest_get_server();
 		$data   = (array) $response->get_data();
-		$links  = $server->get_compact_response_links( $response );
+		$links  = $server::get_compact_response_links( $response );
 		if ( ! empty( $links ) ) {
 			$data['_links'] = $links;
 		}
diff --git a/src/wp-includes/rest-api/class-wp-rest-server.php b/src/wp-includes/rest-api/class-wp-rest-server.php
index 0e71ef966e..252daf3e99 100644
--- a/src/wp-includes/rest-api/class-wp-rest-server.php
+++ b/src/wp-includes/rest-api/class-wp-rest-server.php
@@ -310,7 +310,7 @@ class WP_REST_Server {
 		$request->set_body_params( wp_unslash( $_POST ) );
 		$request->set_file_params( $_FILES );
 		$request->set_headers( $this->get_headers( wp_unslash( $_SERVER ) ) );
-		$request->set_body( $this->get_raw_data() );
+		$request->set_body( self::get_raw_data() );
 
 		/*
 		 * HTTP method override for clients that can't use PUT/PATCH/DELETE. First, we check
@@ -437,7 +437,7 @@ class WP_REST_Server {
 	 */
 	public function response_to_data( $response, $embed ) {
 		$data  = $response->get_data();
-		$links = $this->get_compact_response_links( $response );
+		$links = self::get_compact_response_links( $response );
 
 		if ( ! empty( $links ) ) {
 			// Convert links to part of the data.
diff --git a/src/wp-includes/rest-api/endpoints/class-wp-rest-controller.php b/src/wp-includes/rest-api/endpoints/class-wp-rest-controller.php
index d610504692..6188bff380 100644
--- a/src/wp-includes/rest-api/endpoints/class-wp-rest-controller.php
+++ b/src/wp-includes/rest-api/endpoints/class-wp-rest-controller.php
@@ -212,7 +212,7 @@ abstract class WP_REST_Controller {
 
 		$data   = (array) $response->get_data();
 		$server = rest_get_server();
-		$links  = $server->get_compact_response_links( $response );
+		$links  = $server::get_compact_response_links( $response );
 
 		if ( ! empty( $links ) ) {
 			$data['_links'] = $links;