diff --git a/windows/welcome/src/SilverOS.Welcome.UI/Components/WizardState.cs b/windows/welcome/src/SilverOS.Welcome.UI/Components/WizardState.cs
index 04b08fd..7dca9ee 100644
--- a/windows/welcome/src/SilverOS.Welcome.UI/Components/WizardState.cs
+++ b/windows/welcome/src/SilverOS.Welcome.UI/Components/WizardState.cs
@@ -5,6 +5,10 @@ namespace SilverOS.Welcome.App.Components;
 public sealed class WizardState
 {
     public FlavourManifest? Flavour { get; set; }
+
+    // Apps step: ids of catalog apps the user chose to install.
+    public HashSet<string> SelectedApps { get; set; } = new();
+
     public string Username { get; set; } = "";
     public string Password { get; set; } = "";
     public string AdminPassword { get; set; } = "";