diff --git a/htdocs/lib/mysql.lib.php3 b/htdocs/lib/mysql.lib.php3
index e7e6be3302d..219bc14df9a 100644
--- a/htdocs/lib/mysql.lib.php3
+++ b/htdocs/lib/mysql.lib.php3
@@ -139,6 +139,9 @@ class Db {
   Function num_rows() {
     return mysql_num_rows($this->results);
   }
+  Function affected_rows() {
+    return mysql_affected_rows($this->results);
+  }
   Function num_fields() {
     return mysql_num_fields($this->results);
   }