diff --git a/GameEngine/Database.php b/GameEngine/Database.php
index 0edae62d..47490acd 100755
--- a/GameEngine/Database.php
+++ b/GameEngine/Database.php
@@ -5435,9 +5435,9 @@ class MYSQLi_DB implements IDbConnection {
 			else{$unit = 'u' . $unit;}
 		++$i;
 		//Fixed part of negativ troops (double troops) - by InCube
-		$array_amt[$i] = $array_amt[$i] < 0 ? 0 : $array_amt[$i];
+		$array_amt[$i] = (int) $array_amt[$i] < 0 ? 0 : $array_amt[$i];
 		//Fixed part of negativ troops (double troops) - by InCube
-		$units .= $unit.' = '.$unit.' '.(($array_mode[$i] == 1)? '+':'-').'  '.$array_amt[$i].(($number > $i+1) ? ', ' : '');
+		$units .= $unit.' = '.$unit.' '.(($array_mode[$i] == 1)? '+':'-').'  '.($array_amt[$i] ? $array_amt[$i] : 0).(($number > $i+1) ? ', ' : '');
 		}
 		$q = "UPDATE ".TB_PREFIX."units set $units WHERE vref = $vref";
 		return mysqli_query($this->dblink,$q);