diff --git a/wp-includes/rest-api/endpoints/class-wp-rest-post-types-controller.php b/wp-includes/rest-api/endpoints/class-wp-rest-post-types-controller.php
index 534aa8ef68..5394d16fdb 100644
--- a/wp-includes/rest-api/endpoints/class-wp-rest-post-types-controller.php
+++ b/wp-includes/rest-api/endpoints/class-wp-rest-post-types-controller.php
@@ -148,6 +148,7 @@ class WP_REST_Post_Types_Controller extends WP_REST_Controller {
 	public function prepare_item_for_response( $post_type, $request ) {
 		$taxonomies = wp_list_filter( get_object_taxonomies( $post_type->name, 'objects' ), array( 'show_in_rest' => true ) );
 		$taxonomies = wp_list_pluck( $taxonomies, 'name' );
+		$base = ! empty( $post_type->rest_base ) ? $post_type->rest_base : $post_type->name;
 		$data = array(
 			'capabilities' => $post_type->cap,
 			'description'  => $post_type->description,
@@ -156,6 +157,7 @@ class WP_REST_Post_Types_Controller extends WP_REST_Controller {
 			'name'         => $post_type->label,
 			'slug'         => $post_type->name,
 			'taxonomies'   => array_values( $taxonomies ),
+			'rest_base'    => $base,
 		);
 		$context = ! empty( $request['context'] ) ? $request['context'] : 'view';
 		$data    = $this->add_additional_fields_to_object( $data, $request );
@@ -164,8 +166,6 @@ class WP_REST_Post_Types_Controller extends WP_REST_Controller {
 		// Wrap the data in a response object.
 		$response = rest_ensure_response( $data );
 
-		$base = ! empty( $post_type->rest_base ) ? $post_type->rest_base : $post_type->name;
-
 		$response->add_links( array(
 			'collection' => array(
 				'href'   => rest_url( sprintf( '%s/%s', $this->namespace, $this->rest_base ) ),
@@ -251,6 +251,12 @@ class WP_REST_Post_Types_Controller extends WP_REST_Controller {
 					'context'      => array( 'view', 'edit' ),
 					'readonly'     => true,
 				),
+				'rest_base'            => array(
+					'description'  => __( 'REST base route for the resource.' ),
+					'type'         => 'string',
+					'context'      => array( 'view', 'edit', 'embed' ),
+					'readonly'     => true,
+				),
 			),
 		);
 		return $this->add_additional_fields_schema( $schema );
diff --git a/wp-includes/rest-api/endpoints/class-wp-rest-taxonomies-controller.php b/wp-includes/rest-api/endpoints/class-wp-rest-taxonomies-controller.php
index 21c0b0e32b..11c306c988 100644
--- a/wp-includes/rest-api/endpoints/class-wp-rest-taxonomies-controller.php
+++ b/wp-includes/rest-api/endpoints/class-wp-rest-taxonomies-controller.php
@@ -177,7 +177,7 @@ class WP_REST_Taxonomies_Controller extends WP_REST_Controller {
 	 * @return WP_REST_Response Response object.
 	 */
 	public function prepare_item_for_response( $taxonomy, $request ) {
-
+		$base = ! empty( $taxonomy->rest_base ) ? $taxonomy->rest_base : $taxonomy->name;
 		$data = array(
 			'name'         => $taxonomy->label,
 			'slug'         => $taxonomy->name,
@@ -187,6 +187,7 @@ class WP_REST_Taxonomies_Controller extends WP_REST_Controller {
 			'types'        => $taxonomy->object_type,
 			'show_cloud'   => $taxonomy->show_tagcloud,
 			'hierarchical' => $taxonomy->hierarchical,
+			'rest_base'    => $base,
 		);
 
 		$context = ! empty( $request['context'] ) ? $request['context'] : 'view';
@@ -196,7 +197,6 @@ class WP_REST_Taxonomies_Controller extends WP_REST_Controller {
 		// Wrap the data in a response object.
 		$response = rest_ensure_response( $data );
 
-		$base = ! empty( $taxonomy->rest_base ) ? $taxonomy->rest_base : $taxonomy->name;
 		$response->add_links( array(
 			'collection'                => array(
 				'href'                  => rest_url( sprintf( '%s/%s', $this->namespace, $this->rest_base ) ),
@@ -285,6 +285,12 @@ class WP_REST_Taxonomies_Controller extends WP_REST_Controller {
 					'context'      => array( 'view', 'edit' ),
 					'readonly'     => true,
 				),
+				'rest_base'            => array(
+					'description'  => __( 'REST base route for the resource.' ),
+					'type'         => 'string',
+					'context'      => array( 'view', 'edit', 'embed' ),
+					'readonly'     => true,
+				),
 			),
 		);
 		return $this->add_additional_fields_schema( $schema );
diff --git a/wp-includes/version.php b/wp-includes/version.php
index dceb84a7ec..f907c52aa8 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.7-beta2-39190';
+$wp_version = '4.7-beta2-39191';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.