diff --git a/src/packages/markdown-preview/stylesheets/markdown-preview.less b/src/packages/markdown-preview/stylesheets/markdown-preview.less
index ad7aeaac8..37f6b0c66 100644
--- a/src/packages/markdown-preview/stylesheets/markdown-preview.less
+++ b/src/packages/markdown-preview/stylesheets/markdown-preview.less
@@ -275,7 +275,6 @@
   // Images & Stuff
   img {
     max-width: 100%;
-    @include box-sizing();
   }
 
   // Gollum Image Tags