diff --git a/app/models/conference.rb b/app/models/conference.rb
index db2a61b..093bb85 100644
--- a/app/models/conference.rb
+++ b/app/models/conference.rb
@@ -33,7 +33,7 @@ class Conference < ActiveRecord::Base
   end
 
   def submissions_grouped_by_confirmation_day
-    submissions = events.approved.confirmed.group('date(propositions.confirmed_at)').select('date(propositions.confirmed_at) as confirmed_at, count(events.id) as number')
+    submissions = events.joins(:proposition).approved.confirmed.group('date(propositions.confirmed_at)').select('date(propositions.confirmed_at) as confirmed_at, count(events.id) as number')
     submissions.group_by { |s| s.confirmed_at.to_date }
   end
 
diff --git a/app/views/management/conferences/show.html.slim b/app/views/management/conferences/show.html.slim
index 2cfff14..c513446 100644
--- a/app/views/management/conferences/show.html.slim
+++ b/app/views/management/conferences/show.html.slim
@@ -31,9 +31,9 @@
             = icon 'thumbs-down', '', class: 'fa-5x'
           .col-xs-9.text-right
             .huge
-              = @conference.events.rejected.count
+              = @conference.events.joins(:proposition).rejected.count
             div
-              = t 'event_states.rejected', count: @conference.events.rejected.count
+              = t 'event_states.rejected', count: @conference.events.joins(:proposition).rejected.count
       = link_to [:management, @conference, :events, {status: :rejected}]
         .panel-footer.text-danger
           span.pull-left = t 'views.conference.see_details'
@@ -48,9 +48,9 @@
             = icon 'thumbs-up', class: 'fa-5x'
           .col-xs-9.text-right
             .huge
-              = @conference.events.approved.count
+              = @conference.events.joins(:proposition).approved.count
             div
-              = t 'event_states.approved', count: @conference.events.approved.count
+              = t 'event_states.approved', count: @conference.events.joins(:proposition).approved.count
       = link_to [:management, @conference, :events, {status: :approved}]
         .panel-footer.text-info
           span.pull-left = t 'views.conference.see_details'
@@ -64,9 +64,9 @@
             = icon 'check', '', class: 'fa-5x'
           .col-xs-9.text-right
             .huge
-              = @conference.events.approved.confirmed.count
+              = @conference.events.joins(:proposition).approved.confirmed.count
             div
-              = t 'event_states.confirmed', count: @conference.events.approved.confirmed.count
+              = t 'event_states.confirmed', count: @conference.events.joins(:proposition).approved.confirmed.count
       = link_to [:management, @conference, :events, {status: :approved, confirmed: true}]
         .panel-footer.text-success
           span.pull-left = t 'views.conference.see_details'