diff --git a/htdocs/accountancy/class/accountancycategory.class.php b/htdocs/accountancy/class/accountancycategory.class.php
index 5a427a79882..98d688da9ce 100644
--- a/htdocs/accountancy/class/accountancycategory.class.php
+++ b/htdocs/accountancy/class/accountancycategory.class.php
@@ -493,7 +493,7 @@ class AccountancyCategory
 	 *
 	 * @param 	int 	$cat_id 				Id if personalized accounting group/category
 	 * @param 	string 	$predefinedgroupwhere 	Sql criteria filter to select accounting accounts
-	 * @return 	array       					Array of accounting accounts
+	 * @return 	array|int       				Array of accounting accounts or -1 if error
 	 */
 	public function getCptsCat($cat_id, $predefinedgroupwhere='')
 	{