diff --git a/libraries/dbi/mysql.dbi.lib.php b/libraries/dbi/mysql.dbi.lib.php
index a922313ba..41fba4ea7 100644
--- a/libraries/dbi/mysql.dbi.lib.php
+++ b/libraries/dbi/mysql.dbi.lib.php
@@ -231,7 +231,7 @@ function PMA_DBI_insert_id($link = NULL) {
     return mysql_insert_id($link);
 }
 
-function PMA_DBI_affected_rows($link) {
+function PMA_DBI_affected_rows($link = NULL) {
     if (empty($link)) {
         if (isset($GLOBALS['userlink'])) {
             $link = $GLOBALS['userlink'];
diff --git a/libraries/dbi/mysqli.dbi.lib.php b/libraries/dbi/mysqli.dbi.lib.php
index 17e6207cd..81ca4a7d2 100644
--- a/libraries/dbi/mysqli.dbi.lib.php
+++ b/libraries/dbi/mysqli.dbi.lib.php
@@ -215,7 +215,7 @@ function PMA_DBI_insert_id($link = '') {
     return mysqli_insert_id($link);
 }
 
-function PMA_DBI_affected_rows($link) {
+function PMA_DBI_affected_rows($link = NULL) {
     if (empty($link)) {
         if (isset($GLOBALS['userlink'])) {
             $link = $GLOBALS['userlink'];