diff --git a/htdocs/accountancy/class/accountancycategory.class.php b/htdocs/accountancy/class/accountancycategory.class.php
index 3c28d4b6932..5a427a79882 100644
--- a/htdocs/accountancy/class/accountancycategory.class.php
+++ b/htdocs/accountancy/class/accountancycategory.class.php
@@ -378,7 +378,7 @@ class AccountancyCategory
 	 * Return list of personalized groups that are active
 	 *
 	 * @param	int			$categorytype		-1=All, 0=Only non computed groups, 1=Only computed groups
-	 * @return	array							Array of groups
+	 * @return	array|int						Array of groups or -1 if error
 	 */
 	public function getCats($categorytype=-1)
 	{