diff --git a/sample/util.ts b/sample/util.ts
index 0e047d4c..03205217 100644
--- a/sample/util.ts
+++ b/sample/util.ts
@@ -57,9 +57,9 @@ export function quitIfWebGPUNotAvailable(
   device.lost.then((reason) => {
     fail(`Device lost ("${reason.reason}"):\n${reason.message}`);
   });
-  device.onuncapturederror = (ev) => {
+  device.addEventListener('uncapturederror', (ev) => {
     fail(`Uncaptured error:\n${ev.error.message}`);
-  };
+  });
 }
 
 /** Fail by showing a console error, and dialog box if possible. */