diff --git a/wp-includes/rest-api.php b/wp-includes/rest-api.php
index a2e3363951..1c73b97824 100644
--- a/wp-includes/rest-api.php
+++ b/wp-includes/rest-api.php
@@ -615,12 +615,27 @@ function rest_handle_options_request( $response, $handler, $request ) {
 	$data     = array();
 
 	foreach ( $handler->get_routes() as $route => $endpoints ) {
-		$match = preg_match( '@^' . $route . '$@i', $request->get_route() );
+		$match = preg_match( '@^' . $route . '$@i', $request->get_route(), $matches );
 
 		if ( ! $match ) {
 			continue;
 		}
 
+		$args = array();
+		foreach ( $matches as $param => $value ) {
+			if ( ! is_int( $param ) ) {
+				$args[ $param ] = $value;
+			}
+		}
+
+		foreach ( $endpoints as $endpoint ) {
+			// Remove the redundant preg_match argument.
+			unset( $args[0] );
+
+			$request->set_url_params( $args );
+			$request->set_attributes( $endpoint );
+		}
+
 		$data = $handler->get_data_for_route( $route, $endpoints, 'help' );
 		$response->set_matched_route( $route );
 		break;
diff --git a/wp-includes/version.php b/wp-includes/version.php
index e113c48c99..e65cae7136 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.2-alpha-44932';
+$wp_version = '5.2-alpha-44933';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.