diff --git a/src/mibew/libs/groups.php b/src/mibew/libs/groups.php
index 6e4e92db..bad5487f 100644
--- a/src/mibew/libs/groups.php
+++ b/src/mibew/libs/groups.php
@@ -202,6 +202,10 @@ function get_group_email($group_id)
 {
     // Try to get group email
     $group = group_by_id($group_id);
+    if (empty($group)) {
+        return '';
+    }
+
     if ($group && !empty($group['vcemail'])) {
         return $group['vcemail'];
     }