diff --git a/app/assets/stylesheets/pages/commits.scss b/app/assets/stylesheets/pages/commits.scss
index 8ba6fcf6de5..e7fcc1ec578 100644
--- a/app/assets/stylesheets/pages/commits.scss
+++ b/app/assets/stylesheets/pages/commits.scss
@@ -274,6 +274,7 @@
     display: none;
     white-space: pre-wrap;
     word-break: normal;
+    border: 1px solid $border-color;
 
     pre {
       border: 0;