diff --git a/stack/cas/keyval.class.php b/stack/cas/keyval.class.php
index 37050bb6f2cd0acc169cd7ae3305c9a5c9540dc1..3233f5ef6dff2810a89824f5acba8438c43e6e3e 100644
--- a/stack/cas/keyval.class.php
+++ b/stack/cas/keyval.class.php
@@ -109,7 +109,7 @@ class stack_cas_keyval {
         $str = str_replace('?', 'QMCHAR', $str);
 
         // CAS keyval may not contain @ outside strings.
-        if (strpos($str, '@') !== false {
+        if (strpos($str, '@') !== false) {
             $this->errors[] = new $this->errclass(stack_string('illegalcaschars'), $this->context);
             $this->valid = false;
             return false;