diff --git a/Flow.Launcher.Infrastructure/FileExplorerHelper.cs b/Flow.Launcher.Infrastructure/FileExplorerHelper.cs
index b738b9c88..65f424e33 100644
--- a/Flow.Launcher.Infrastructure/FileExplorerHelper.cs
+++ b/Flow.Launcher.Infrastructure/FileExplorerHelper.cs
@@ -68,7 +68,7 @@ namespace Flow.Launcher.Infrastructure
             var numRemaining = hWnds.Count;
             PInvoke.EnumWindows((wnd, _) =>
             {
-                var searchIndex = hWnds.FindIndex(x => x.HWND == wnd.Value);
+                var searchIndex = hWnds.FindIndex(x => x.HWND == wnd.Value.ToInt64());
                 if (searchIndex != -1)
                 {
                     z[searchIndex] = index;