diff --git a/app/assets/stylesheets/pages/diff.scss b/app/assets/stylesheets/pages/diff.scss
index 1a7d5f9666eb96957b3ec696474b1ce79e790525..5286b73cc5036884aa29ca1a9319365c3066124d 100644
--- a/app/assets/stylesheets/pages/diff.scss
+++ b/app/assets/stylesheets/pages/diff.scss
@@ -4,6 +4,11 @@
   margin-bottom: $gl-padding;
   border-radius: 3px;
 
+  .commit-short-id {
+    font-family: $regular_font;
+    font-weight: 400;
+  }
+
   .diff-header {
     position: relative;
     background: $background-color;