diff --git a/admin/app/models/cohort.rb b/admin/app/models/cohort.rb
index cf18df9ab..a4fb6030f 100644
--- a/admin/app/models/cohort.rb
+++ b/admin/app/models/cohort.rb
@@ -120,10 +120,13 @@ class Cohort < ActiveRecord::Base
             end
     sql =<<SQL
 SELECT COUNT(*) FROM 
-  (SELECT COUNT(*) cnt FROM #{MusicSessionUserHistory.table_name} 
+  (SELECT COUNT(*) cnt FROM music_sessions_user_history msuh1
     WHERE 
-      created_at >= '#{self.start_date}' AND created_at <= '#{self.end_date}' AND
-      EXTRACT(EPOCH FROM (session_removed_at - created_at)) >= 900
+      msuh1.created_at >= '#{self.start_date}' AND msuh1.created_at <= '#{self.end_date}' AND
+      EXTRACT(EPOCH FROM (msuh1.session_removed_at - msuh1.created_at)) >= 900 AND
+      (SELECT COUNT(*) FROM music_sessions_user_history msuh2
+         WHERE msuh1.music_session_id = msuh2.music_session_id
+      ) > 1
     GROUP BY user_id
   ) played
 WHERE #{where}