diff --git a/Moonlight.ApiServer/Implementations/Diagnose/CoreConfigDiagnoseProvider.cs b/Moonlight.ApiServer/Implementations/Diagnose/CoreConfigDiagnoseProvider.cs
index 29275823..e0b1480a 100644
--- a/Moonlight.ApiServer/Implementations/Diagnose/CoreConfigDiagnoseProvider.cs
+++ b/Moonlight.ApiServer/Implementations/Diagnose/CoreConfigDiagnoseProvider.cs
@@ -42,6 +42,8 @@ public class CoreConfigDiagnoseProvider : IDiagnoseProvider
         config.Authentication.OAuth2.Secret = CheckForNullOrEmpty(config.Authentication.OAuth2.Secret);
 
         config.Authentication.Secret = CheckForNullOrEmpty(config.Authentication.Secret);
+        
+        config.Authentication.OAuth2.ClientId = CheckForNullOrEmpty(config.Authentication.OAuth2.ClientId);
 
         await archive.AddText("core/config.txt",
             JsonSerializer.Serialize(config, new JsonSerializerOptions() { WriteIndented = true }));