diff --git a/projects/plugins/jetpack/class.json-api-endpoints.php b/projects/plugins/jetpack/class.json-api-endpoints.php
index cd8210e933c1a..bd3ec25fef303 100644
--- a/projects/plugins/jetpack/class.json-api-endpoints.php
+++ b/projects/plugins/jetpack/class.json-api-endpoints.php
@@ -2737,6 +2737,8 @@ public function rest_callback( WP_REST_Request $request ) {
 			$response = WPCOM_JSON_API::serializable_error( $response );
 		}
 
+		$response = wp_json_encode( $response );
+
 		if ( $request->get_param( 'http_envelope' ) ) {
 			$response = wp_json_encode( WPCOM_JSON_API::wrap_http_envelope( $status_code, $response, 'application/json' ) );
 		}