diff --git a/GameEngine/Building.php b/GameEngine/Building.php
index 131097ab..fee43898 100644
--- a/GameEngine/Building.php
+++ b/GameEngine/Building.php
@@ -698,7 +698,7 @@ class Building {
 				$q = "UPDATE ".TB_PREFIX."fdata set f".$jobs['field']." = ".$jobs['level'].", f".$jobs['field']."t = ".$jobs['type']." where vref = ".$jobs['wid'];
 				}
 				}
-				if($database->query($q) && ($enought_res == 1 or $jobs['master'])) {
+				if($database->query($q) && ($enought_res = 1 or $jobs['master'])) {
 					$database->modifyPop($jobs['wid'],$resource['pop'],0);
 					$database->addCP($jobs['wid'],$resource['cp']);
 					$q = "DELETE FROM ".TB_PREFIX."bdata where id = ".$jobs['id'];