diff --git a/wp-admin/categories.php b/wp-admin/categories.php
index 9f444faca2..7c46005caf 100644
--- a/wp-admin/categories.php
+++ b/wp-admin/categories.php
@@ -44,9 +44,13 @@ case 'delete':
 	$cat_ID = (int) $_GET['cat_ID'];
 	$cat_name = get_catname($cat_ID);
 
-	if ( 1 == $cat_ID )
+	// Don't delete the default cats.
+    if ( $cat_ID == get_option('default_category') )
 		die(sprintf(__("Can't delete the <strong>%s</strong> category: this is the default one"), $cat_name));
 
+    if ( $cat_ID == get_option('default_link_category') )
+		die(sprintf(__("Can't delete the <strong>%s</strong> category: this is the default one for bookmarks"), $cat_name));
+
 	wp_delete_category($cat_ID);
 
 	header('Location: categories.php?message=2');