diff --git a/Tests/MQTTnet.TestApp.AspNetCore2/Startup.cs b/Tests/MQTTnet.TestApp.AspNetCore2/Startup.cs
index 9e5f90ae..591cc87d 100644
--- a/Tests/MQTTnet.TestApp.AspNetCore2/Startup.cs
+++ b/Tests/MQTTnet.TestApp.AspNetCore2/Startup.cs
@@ -5,6 +5,7 @@ using Microsoft.AspNetCore.Builder;
 using Microsoft.AspNetCore.Hosting;
 using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Extensions.FileProviders;
+using MQTTnet;
 using MQTTnet.AspNetCore;
 using MQTTnet.Server;