diff --git a/wp-admin/admin-functions.php b/wp-admin/admin-functions.php
index 4939b82848..0a7662a8fa 100644
--- a/wp-admin/admin-functions.php
+++ b/wp-admin/admin-functions.php
@@ -478,7 +478,6 @@ function wp_delete_user($id, $reassign = 'novalue') {
 	return true;
 }
 
-
 function post_exists($title, $content = '', $post_date = '') {
 	global $wpdb;
 	
@@ -493,6 +492,13 @@ function post_exists($title, $content = '', $post_date = '') {
 	return 0;
 }
 
+function comment_exists($comment_author, $comment_date) {
+	global $wpdb;
+
+	return $wpdb->get_var("SELECT comment_post_ID FROM $wpdb->comments
+		WHERE comment_author = '$comment_author' AND comment_date = '$comment_date'");
+}
+
 function url_shorten ($url) {
 	$short_url = str_replace('http://', '', stripslashes($url));
 	$short_url = str_replace('www.', '', $short_url);