diff --git a/packages/stack/src/providers/stack-provider-client.tsx b/packages/stack/src/providers/stack-provider-client.tsx
index 797280304..f9f20c6bf 100644
--- a/packages/stack/src/providers/stack-provider-client.tsx
+++ b/packages/stack/src/providers/stack-provider-client.tsx
@@ -17,7 +17,7 @@ export function StackProviderClient(props: {
   const appJson = props.appJson;
   const app = StackClientApp[stackAppInternalsSymbol].fromClientJson(appJson);
 
-  globalVar._stackAuth = { app };
+  globalVar.__STACK_AUTH__ = { app };
 
   return (
     <StackContext.Provider value={{ app }}>