diff --git a/wp-includes/rest-api/class-wp-rest-server.php b/wp-includes/rest-api/class-wp-rest-server.php
index 8fe9834a8d..cc633aa253 100644
--- a/wp-includes/rest-api/class-wp-rest-server.php
+++ b/wp-includes/rest-api/class-wp-rest-server.php
@@ -1339,9 +1339,7 @@ class WP_REST_Server {
 	 * @return false|string Boolean false or string error message.
 	 */
 	protected function get_json_last_error() {
-		$last_error_code = json_last_error();
-
-		if ( JSON_ERROR_NONE === $last_error_code || empty( $last_error_code ) ) {
+		if ( JSON_ERROR_NONE === json_last_error() ) {
 			return false;
 		}
 
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 769bc52cd1..39d4458bee 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '6.9-alpha-60150';
+$wp_version = '6.9-alpha-60151';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.