diff -urNp -x '*.orig' apache_1.3.42.org/src/modules/standard/mod_autoindex.c apache_1.3.42/src/modules/standard/mod_autoindex.c
--- apache_1.3.42.org/src/modules/standard/mod_autoindex.c	2023-02-02 22:43:12.489834914 +0100
+++ apache_1.3.42/src/modules/standard/mod_autoindex.c	2023-02-02 22:43:12.716501580 +0100
@@ -59,6 +59,7 @@ module MODULE_VAR_EXPORT autoindex_modul
 #define TRACK_MODIFIED 1024
 #define SORT_NOCASE 2048
 #define STUDLY_INDEXING 4096
+#define INDEXOPT_INDEXES 8192
 
 #define K_PAD 1
 #define K_NOPAD 0
@@ -421,6 +422,9 @@ static const char *add_opts(cmd_parms *c
 	else if (!strcasecmp(w, "IgnoreCase")) {
 	    option = SORT_NOCASE;
 	}
+	else if (!strcasecmp(w, "Indexes")) {
+            option = INDEXOPT_INDEXES;
+	}
 	else if (!strcasecmp(w, "None")) {
 	    if (action != '\0') {
 		return "Cannot combine '+' or '-' with 'None' keyword";
@@ -1970,7 +1974,7 @@ static int index_directory(request_rec *
 static int handle_autoindex(request_rec *r)
 {
     autoindex_config_rec *d;
-    int allow_opts = ap_allow_options(r);
+    int opt_indexes = ap_allow_options(r) & OPT_INDEXES;
 
     d = (autoindex_config_rec *) ap_get_module_config(r->per_dir_config,
 						      &autoindex_module);
@@ -1981,8 +1985,12 @@ static int handle_autoindex(request_rec
     }
 
     /* OK, nothing easy.  Trot out the heavy artillery... */
+    if ((d->incremented_opts & INDEXOPT_INDEXES) ||
+	(d->opts & INDEXOPT_INDEXES)) opt_indexes = 1;
+    if ((d->decremented_opts & INDEXOPT_INDEXES) &&
+	!(d->opts & INDEXOPT_INDEXES)) opt_indexes = 0;
 
-    if (allow_opts & OPT_INDEXES) {
+    if (opt_indexes) {
 	/* KLUDGE --- make the sub_req lookups happen in the right directory.
 	 * Fixing this in the sub_req_lookup functions themselves is difficult,
 	 * and would probably break virtual includes...