diff --git a/contrib/js/nntpchan/reply.js b/contrib/js/nntpchan/reply.js
index bf1f34a..eb27777 100644
--- a/contrib/js/nntpchan/reply.js
+++ b/contrib/js/nntpchan/reply.js
@@ -255,6 +255,8 @@ function init(prefix) {
         if ($dragging) {
             var x = ev.pageX - $(this).width() / 2,
                 y = ev.pageY - $(this).height() / 2;
+            y -= $(e).height();
+            x -= $(e).width();
             $(e).offset({
                 top: y,
                 left: x