diff --git a/src/common/Platform.ts b/src/common/Platform.ts
index 7ea0e9c6..7cfb9f87 100644
--- a/src/common/Platform.ts
+++ b/src/common/Platform.ts
@@ -14,9 +14,9 @@ interface INavigator {
 declare const navigator: INavigator;
 declare const process: unknown;
 
-// navigator is also checked here because bundling with the process module can cause issues
-// otherwise
-export const isNode = (typeof process !== 'undefined' && 'title' in (process as any) && typeof navigator === 'undefined') ? true : false;
+// navigator.userAgent is also checked here because bundling with the process module can cause
+// issues otherwise. Note that navigator exists in Node.js 21+ but the userAgent is "Node.js/<version>".
+export const isNode = (typeof process !== 'undefined' && 'title' in (process as any) && (typeof navigator === 'undefined' || navigator.userAgent.startsWith('Node.js/'))) ? true : false;
 const userAgent = (isNode) ? 'node' : navigator.userAgent;
 const platform = (isNode) ? 'node' : navigator.platform;