diff --git a/core/lib/Thelia/Model/Base/RewritingUrl.php b/core/lib/Thelia/Model/Base/RewritingUrl.php
index 75ee97e79..a6bcd3a26 100644
--- a/core/lib/Thelia/Model/Base/RewritingUrl.php
+++ b/core/lib/Thelia/Model/Base/RewritingUrl.php
@@ -298,7 +298,7 @@ abstract class RewritingUrl implements ActiveRecordInterface
      */
     public function hasVirtualColumn($name)
     {
-        return array_key_exists($name, $this->virtualColumns);
+        return isset($this->virtualColumns[$name]);
     }
 
     /**
diff --git a/install/sqldb.map b/install/sqldb.map
new file mode 100644
index 000000000..63a93baa8
--- /dev/null
+++ b/install/sqldb.map
@@ -0,0 +1,2 @@
+# Sqlfile -> Database map
+thelia.sql=thelia