diff --git a/database/DataBaseConnector.php b/database/DataBaseConnector.php
index 27a49e3..e47b679 100644
--- a/database/DataBaseConnector.php
+++ b/database/DataBaseConnector.php
@@ -456,6 +456,8 @@ INNER JOIN networks nt ON na.network_id=nt.id INNER JOIN agents ag ON ag.id=na.a
             $re = [];
             if ($result) {
                 while ($row = mysqli_fetch_array($result, MYSQLI_ASSOC)) {
+                    $row['balance_princ'] = $row['balance_princ'] == null ? 0 : $row['balance_princ'];
+                    $row['balance_com'] = $row['balance_com'] == null ? 0 : $row['balance_com'];
                     $rows[] = $row;
                 }
                 $re['val'] = $rows;