diff --git a/contrib/js/nntpchan/reply.js b/contrib/js/nntpchan/reply.js
index 32cca11..e7c3a79 100644
--- a/contrib/js/nntpchan/reply.js
+++ b/contrib/js/nntpchan/reply.js
@@ -253,8 +253,8 @@ function init(prefix) {
 
     $(rpl.elem).on("mousemove", function(ev) {
         if ($dragging) {
-            var x = ev.pageX, // - $(this).width() / 2,
-                y = ev.pageY; //- $(this).height() / 2;
+            var x = ev.pageX - $(this).width() / 2,
+                y = ev.pageY - $(this).height() / 2;
             $dragging.offset({
                 top: y,
                 left: x