diff --git a/sites/all/modules/unl/unl_cas.module b/sites/all/modules/unl/unl_cas.module
index aecf15d7ad61bcb08a13324b3c458f3f73a9e332..0b63445a17b7266d86c541031f835df8e7405210 100644
--- a/sites/all/modules/unl/unl_cas.module
+++ b/sites/all/modules/unl/unl_cas.module
@@ -1,5 +1,10 @@
 <?php
 
+function unl_cas_enable()
+{
+    variable_set('user_register', 0);
+}
+
 function unl_cas_init()
 {
     require_once dirname(__FILE__) . '/lib/CAS/CAS.php';