diff --git a/app/lib/feed_manager.rb b/app/lib/feed_manager.rb
index 1fb224a1337..97cb25d58f5 100644
--- a/app/lib/feed_manager.rb
+++ b/app/lib/feed_manager.rb
@@ -558,7 +558,7 @@ class FeedManager
       arr = crutches[:active_mentions][s.id] || []
       arr.push(s.account_id)
 
-      if s.reblog?
+      if s.reblog? && s.reblog.present?
         arr.push(s.reblog.account_id)
         arr.concat(crutches[:active_mentions][s.reblog_of_id] || [])
       end