diff --git a/htdocs/product/class/api_products.class.php b/htdocs/product/class/api_products.class.php
index 45ba2e61afd..4108ed79075 100644
--- a/htdocs/product/class/api_products.class.php
+++ b/htdocs/product/class/api_products.class.php
@@ -188,13 +188,11 @@ class Products extends DolibarrApi
 		$socid = DolibarrApiAccess::$user->socid ? DolibarrApiAccess::$user->socid : '';
 
 		$sql = "SELECT t.rowid, t.ref, t.ref_ext";
-		$sql .= " FROM ".MAIN_DB_PREFIX."product as t";
+		$sql .= " FROM ".$this->db->prefix()."product as t";
+		$sql .= " LEFT JOIN ".MAIN_DB_PREFIX."product_extrafields AS ef ON ef.fk_object = t.rowid";	// So we will be able to filter on extrafields
 		if ($category > 0) {
 			$sql .= ", ".MAIN_DB_PREFIX."categorie_product as c";
 		}
-
-		$sql .= " LEFT JOIN ".MAIN_DB_PREFIX."product_extrafields AS ef ON (ef.fk_object = t.rowid)";
-
 		$sql .= ' WHERE t.entity IN ('.getEntity('product').')';
 
 		if ($variant_filter == 1) {