diff --git a/kamailio/registrar-role.cfg b/kamailio/registrar-role.cfg
index 0c1698f..d544835 100644
--- a/kamailio/registrar-role.cfg
+++ b/kamailio/registrar-role.cfg
@@ -268,10 +268,10 @@ route[SAVE_LOCATION]
        $var(Status) = "Unregistered";
     } else {
        $var(Status) = "Registered";
-       if($var(Expires) < REGISTRAR_MIN_EXPIRES) {
-          $var(Expires) = REGISTRAR_MIN_EXPIRES;
-       } else if($var(Expires) > REGISTRAR_MAX_EXPIRES) {
-          $var(Expires) = REGISTRAR_MAX_EXPIRES;
+       if($var(expires) < REGISTRAR_MIN_EXPIRES) {
+          $var(expires) = REGISTRAR_MIN_EXPIRES;
+       } else if($var(expires) > REGISTRAR_MAX_EXPIRES) {
+          $var(expires) = REGISTRAR_MAX_EXPIRES;
        }
     }