diff --git a/app/models/summary.rb b/app/models/summary.rb
index d55f7aa..ed05dd5 100644
--- a/app/models/summary.rb
+++ b/app/models/summary.rb
@@ -2,7 +2,7 @@ class Summary
   def initialize(params = {})
     @talk_id, @other_talk_ids = params[:talk_id], params[:other_talk_ids]
     @votes_count = SelectedTalk.where(talk_id: @talk_id).count
-    @all_votes_count = TalkPreference.joins(:selected_talks).where(selected_talks: {talk_id: @other_talk_ids << @talk_id}).count
+    @all_votes_count = TalkPreference.joins(:selected_talks).where(selected_talks: {talk_id: @other_talk_ids << @talk_id}).uniq.count
   end
 
   def summary