diff --git a/gtk/gtkapplication.c b/gtk/gtkapplication.c
index 3607b69f5e..205d37730b 100644
--- a/gtk/gtkapplication.c
+++ b/gtk/gtkapplication.c
@@ -376,6 +376,18 @@ static void
 gtk_application_after_emit (GApplication *application,
                             GVariant     *platform_data)
 {
+  const char *startup_notification_id = NULL;
+
+  g_variant_lookup (platform_data, "desktop-startup-id", "&s", &startup_notification_id);
+  if (startup_notification_id)
+    {
+      GdkDisplay *display;
+
+      display = gdk_display_get_default ();
+      if (display)
+        gdk_display_notify_startup_complete (display, startup_notification_id);
+    }
+
   gdk_threads_leave ();
 }