diff --git a/packages/services/user-service/src/auth/auth.controller.ts b/packages/services/user-service/src/auth/auth.controller.ts
index 2ce8c90..68dbd47 100644
--- a/packages/services/user-service/src/auth/auth.controller.ts
+++ b/packages/services/user-service/src/auth/auth.controller.ts
@@ -48,7 +48,7 @@ export class AuthController {
   @Post('anonymous')
   @HttpCode(HttpStatus.OK)
   async createAnonymousSession(@Body() dto: CreateAnonymousDto) {
-    const result = await this.authService.createAnonymousSession(dto.fingerprint);
+    const result = await this.authService.createAnonymousSession(dto.fingerprint || '');
     return {
       success: true,
       data: result,