diff --git a/4chan_x.user.js b/4chan_x.user.js
index 0f2cc082f..f38c41f10 100644
--- a/4chan_x.user.js
+++ b/4chan_x.user.js
@@ -2419,7 +2419,7 @@
       if (a.parentNode.className !== 'op') {
         filesize = $('span.filesize', a.parentNode);
         _ref2 = filesize.textContent.match(/(\d+)x/), _ = _ref2[0], max = _ref2[1];
-        img.setAttribute('style', "max-width: -moz-calc(" + max + "px);");
+        img.style.maxWidth = "-moz-calc(" + max + "px)";
       }
       return a.appendChild(img);
     },
diff --git a/script.coffee b/script.coffee
index 7f70f0cb1..19adb312a 100644
--- a/script.coffee
+++ b/script.coffee
@@ -1812,7 +1812,7 @@ imgExpand =
     unless a.parentNode.className is 'op'
       filesize = $ 'span.filesize', a.parentNode
       [_, max] = filesize.textContent.match /(\d+)x/
-      img.setAttribute 'style', "max-width: -moz-calc(#{max}px);"
+      img.style.maxWidth = "-moz-calc(#{max}px)"
     a.appendChild img
 
   dialog: ->