diff --git a/src/ViewModels/LFSLocks.cs b/src/ViewModels/LFSLocks.cs
index d5820b64..8f2eec40 100644
--- a/src/ViewModels/LFSLocks.cs
+++ b/src/ViewModels/LFSLocks.cs
@@ -47,7 +47,7 @@ namespace SourceGit.ViewModels
             {
                 if (string.IsNullOrEmpty(_userName))
                 {
-                    //todo: add an error popup
+                    App.RaiseException(_repo, "Username is empty");
                     return Locks;
                 }