diff --git a/app/assets/stylesheets/common.scss b/app/assets/stylesheets/common.scss
index ab3d44d..69a3d74 100644
--- a/app/assets/stylesheets/common.scss
+++ b/app/assets/stylesheets/common.scss
@@ -660,7 +660,7 @@ li.note {
     margin-right:40px;
 
     .prev {
-      @extend .borders;
+      @extend .thumbnail;
       height:120px;
       width:175px;
       margin-bottom:10px;
--
libgit2 0.21.2