diff --git a/app/views/shared/milestones/_sidebar.html.haml b/app/views/shared/milestones/_sidebar.html.haml
index 40379f48393e7186e4c9df4595ba75c59753fc97..28cf17f667777274b2f4d80788f2dc9b78a44af6 100644
--- a/app/views/shared/milestones/_sidebar.html.haml
+++ b/app/views/shared/milestones/_sidebar.html.haml
@@ -88,7 +88,7 @@
     .block.merge-requests
       .sidebar-collapsed-icon
         %strong
-          = icon('exclamation', 'aria-hidden': 'true')
+          = custom_icon('mr_bold')
         %span= milestone.merge_requests.count
       .title.hide-collapsed
         Merge requests