--- a/src/idmef-class.c	2020-09-09 13:11:05.000000000 +0200
+++ b/src/idmef-class.c	2026-10-19 19:09:12.134815234 +0200
@@ -161,7 +161,7 @@ const char **idmef_class_get_child_attri
 
         ret = is_child_valid(class, child);
         if ( ret < 0 )
-                return ret;
+                return NULL;
 
         return object_data[class].children_list[child].attributes;
 }