diff --git a/examples/jsm/capabilities/WebGPU.js b/examples/jsm/capabilities/WebGPU.js
index 1d24de73d69756..459c3e0b629633 100644
--- a/examples/jsm/capabilities/WebGPU.js
+++ b/examples/jsm/capabilities/WebGPU.js
@@ -1,5 +1,4 @@
-let isAvailable = navigator.gpu !== undefined;
-
+let isAvailable = ( typeof navigator !== 'undefined'  && navigator.gpu !== undefined );
 
 if ( typeof window !== 'undefined' && isAvailable ) {