diff --git a/wp-admin/edit-form-comment.php b/wp-admin/edit-form-comment.php
index 8e5cac5e1..447d1b553 100644
--- a/wp-admin/edit-form-comment.php
+++ b/wp-admin/edit-form-comment.php
@@ -130,7 +130,7 @@ $date = date_i18n( $datef, strtotime( $comment->comment_date ) );
 
 <input type="hidden" name="c" value="<?php echo attr($comment->comment_ID) ?>" />
 <input type="hidden" name="p" value="<?php echo attr($comment->comment_post_ID) ?>" />
-<input name="referredby" type="hidden" id="referredby" value="<?php echo attr(clean_url(stripslashes(wp_get_referer()))); ?>" />
+<input name="referredby" type="hidden" id="referredby" value="<?php echo clean_url(stripslashes(wp_get_referer())); ?>" />
 <?php wp_original_referer_field(true, 'previous'); ?>
 <input type="hidden" name="noredir" value="1" />