fixes #3913

Closes #3913

Merge request studip/studip!2794

lib/classes/Siteinfo.php

@@ -580,7 +580,7 @@ class SiteinfoMarkupEngine {
                                          "title" => _("Evaluationen"),
                                          "detail" => "",
                                          "constraint" => Config::get()->VOTE_ENABLE];
-        $indicator['wiki_pages'] = ["query" => "SELECT COUNT(DISTINCT keyword) AS count FROM wiki",
+        $indicator['wiki_pages'] = ["query" => "SELECT COUNT(*) AS count FROM wiki_pages",
                                          "title" => _("Wiki-Seiten"),
                                          "detail" => "",
                                          "constraint" => Config::get()->WIKI_ENABLE];