diff --git a/app/helpers/bubbles_helper.rb b/app/helpers/bubbles_helper.rb
index e1d2fdc84..8bdf50648 100644
--- a/app/helpers/bubbles_helper.rb
+++ b/app/helpers/bubbles_helper.rb
@@ -8,7 +8,7 @@ module BubblesHelper
   end
 
   def bubble_size(bubble)
-    activity = bubble.boost_count + bubble.comments.count
+    activity = bubble.boost_count + bubble.comments.size
     rank =
       case activity
       when 0..5   then "one"