diff --git a/soundmap.php b/soundmap.php
index f0069d3..95284c6 100644
--- a/soundmap.php
+++ b/soundmap.php
@@ -833,7 +833,7 @@ if (!class_exists('Soundmap')){
 
 		function soinumapa_rest_marker_by_language($args) {
 			global $polylang;
-			$language = $polylang->curlang->slug;
+			if (isset($polylang)) $language = $polylang->curlang->slug;
 			if (isset($language)) { $args['lang'] = $language; }
 			return $args;
 		}