diff --git a/wp-includes/functions-post.php b/wp-includes/functions-post.php
index 413a2bf40..4f70f5119 100644
--- a/wp-includes/functions-post.php
+++ b/wp-includes/functions-post.php
@@ -343,7 +343,7 @@ function trackback_url_list($tb_list, $post_id) {
 		$excerpt = strip_tags($post_excerpt?$post_excerpt:$post_content);
 		
 		if (strlen($excerpt) > 255) {
-			$exerpt = substr($excerpt,0,252) . '...';
+			$excerpt = substr($excerpt,0,252) . '...';
 		}
 		
 		$trackback_urls = explode(',', $tb_list);