diff --git a/include/sanity_check.php b/include/sanity_check.php
index ee3a0b006540f6d707b76e2e97137036e6e3ae97..2a39cfa42fcf28e5727f6d0db2b8fc83ce8450b1 100644
--- a/include/sanity_check.php
+++ b/include/sanity_check.php
@@ -12,6 +12,10 @@
 
 			require_once "sanity_config.php";
 
+			if (strpos(PLUGINS, "auth_") === FALSE) {
+				array_push($errors, "Please enable at least one authentication module via PLUGINS constant in config.php");
+			}
+
 			if (function_exists('posix_getuid') && posix_getuid() == 0) {
 				array_push($errors, "Please don't run this script as root.");
 			}