diff -urNp -x '*.orig' amanda-3.5.1.org/amandad-src/amandad.c amanda-3.5.1/amandad-src/amandad.c
--- amanda-3.5.1.org/amandad-src/amandad.c	2017-12-01 14:26:32.000000000 +0100
+++ amanda-3.5.1/amandad-src/amandad.c	2021-05-08 10:23:15.193461026 +0200
@@ -476,6 +476,11 @@ main(
 	exit_on_qlength = 1;
     }
 
+    /* krb5 require the euid to be 0 */
+    if (strcasecmp(auth, "krb5") == 0) {
+	if(seteuid((uid_t)0) != 0) { error("Can't set euid to 0"); };
+    }
+
 #ifndef SINGLE_USERID
     if (getuid() == 0) {
 	if (strcasecmp(auth, "krb5") != 0) {
@@ -510,11 +515,6 @@ main(
 	dbprintf(_("WARNING: argv[0] not defined: check inetd.conf\n"));
     }
 
-    /* krb5 require the euid to be 0 */
-    if (strcasecmp(auth, "krb5") == 0) {
-	if(seteuid((uid_t)0) != 0) { error("Can't set euid to 0"); };
-    }
-
     /*
      * Schedule to call protocol_accept() when new security handles
      * are created on stdin.