diff --git a/lib/ycom_user.php b/lib/ycom_user.php
index 5bde368..5ee96b1 100644
--- a/lib/ycom_user.php
+++ b/lib/ycom_user.php
@@ -17,7 +17,7 @@ public function isInGroup(int $group_id): bool
     {
         $ycom_groups = (string) $this->getValue('ycom_groups');
 
-        if ('' === $group_id) {
+        if (1 > $group_id) {
             return true;
         }
         if ('' !== $ycom_groups) {