--- xscreensaver-6.16/driver/xscreensaver.c	2026-01-21 20:39:29.454821723 +0100
+++ xscreensaver-6.16/driver/xscreensaver.c	2026-09-27 16:21:19.734642300 +0200
@@ -2453,7 +2453,7 @@
       exit (1);
     }
 
-  if (uid != euid && setgid (gid) != 0)
+  if (uid != euid && setuid (uid) != 0)
     {
       fprintf (stderr, "%s: setuid %d -> %d failed\n", blurb(), euid, uid);
       exit (1);