diff --git a/modules/renderer/map.js b/modules/renderer/map.js
index 5cd853cec..6b2016c8f 100644
--- a/modules/renderer/map.js
+++ b/modules/renderer/map.js
@@ -521,7 +521,7 @@ export function rendererMap(context) {
     };
 
 
-    map.isTransformed = function(_) {
+    map.isTransformed = function() {
         return _transformed;
     };