diff --git a/Plugins/Wox.Plugin.Program/AddProgramSource.xaml.cs b/Plugins/Wox.Plugin.Program/AddProgramSource.xaml.cs
index a8b090b86e..68230ba241 100644
--- a/Plugins/Wox.Plugin.Program/AddProgramSource.xaml.cs
+++ b/Plugins/Wox.Plugin.Program/AddProgramSource.xaml.cs
@@ -53,6 +53,7 @@ namespace Wox.Plugin.Program
                 var source = new Settings.ProgramSource
                 {
                     Location = Directory.Text,
+                    UniqueIdentifier = Directory.Text
                 };
                 _settings.ProgramSources.Insert(0, source);
             }