diff --git a/packages/core/src/textures/resources/CanvasResource.js b/packages/core/src/textures/resources/CanvasResource.js
index f245f51..68252b8 100644
--- a/packages/core/src/textures/resources/CanvasResource.js
+++ b/packages/core/src/textures/resources/CanvasResource.js
@@ -20,7 +20,7 @@
     {
         return (source && (
             source instanceof HTMLCanvasElement
-            || source instanceof global.OffscreenCanvas
+            || source instanceof window.OffscreenCanvas
         ));
     }
 }