diff --git a/www/pages/matrixprodukt.php b/www/pages/matrixprodukt.php
index ec7f9115..3b9ff5ad 100644
--- a/www/pages/matrixprodukt.php
+++ b/www/pages/matrixprodukt.php
@@ -379,7 +379,7 @@ class Matrixprodukt
                         }
                         $list = $newList;
                     }
-                    $oldnumber = $this->app->DB->Select("SELECT nummer FROM artikel WHERE id = (int)$json->articleId");
+                    $oldnumber = $this->app->DB->Select("SELECT nummer FROM artikel WHERE id = ".((int)$json->articleId));
                     $created = [];
                     foreach ($list as $optionSet) {
                         $variantId = $this->service->GetVariantIdByOptionSet($optionSet);
@@ -446,4 +446,4 @@ class Matrixprodukt
         $this->app->YUI->TableSearch('TABOPT', 'matrixproduct_option_translations', "show", "", "", basename(__FILE__), __CLASS__);
         $this->app->Tpl->Parse('PAGE', "matrixprodukt_translation.tpl");
     }
-}
\ No newline at end of file
+}