diff --git a/Duplicati.Library.RestAPI/WebServer/Server.cs b/Duplicati.Library.RestAPI/WebServer/Server.cs
index 6ea6696294..c8e4408f38 100644
--- a/Duplicati.Library.RestAPI/WebServer/Server.cs
+++ b/Duplicati.Library.RestAPI/WebServer/Server.cs
@@ -264,7 +264,7 @@ private static HttpServer.HttpServer CreateServer(IDictionary<string, string> op
                     (
                         userroot.StartsWith(Util.AppendDirSeparator(System.Reflection.Assembly.GetExecutingAssembly().Location), Library.Utility.Utility.ClientFilenameStringComparison)
                         ||
-                        userroot.StartsWith(Util.AppendDirSeparator(Program.StartupPath), Library.Utility.Utility.ClientFilenameStringComparison)
+                        userroot.StartsWith(Util.AppendDirSeparator(Duplicati.Library.AutoUpdater.UpdaterManager.InstalledBaseDir), Library.Utility.Utility.ClientFilenameStringComparison)
                     )
                 )
 #endif