diff --git a/include/login/class_LoginCAS.inc b/include/login/class_LoginCAS.inc
index 462dbab9189c7f0188220b12d374438003710346..25916de4345b19ab83e06074849bae4b614a0fc7 100644
--- a/include/login/class_LoginCAS.inc
+++ b/include/login/class_LoginCAS.inc
@@ -44,7 +44,7 @@ class LoginCAS extends LoginMethod
     }
 
     // Initialize CAS with proper library and call.
-    if ($config->get_cfg_value('CasLibraryBool')) {
+    if ($config->get_cfg_value('CasLibraryBool') === 'TRUE') {
       phpCAS::client(
         CAS_VERSION_2_0,
         $config->get_cfg_value('CasHost', 'localhost'),