diff --git a/app/views/shared/archives/_table.html.haml b/app/views/shared/archives/_table.html.haml
index f63d6aa8d..87d65317f 100644
--- a/app/views/shared/archives/_table.html.haml
+++ b/app/views/shared/archives/_table.html.haml
@@ -8,7 +8,7 @@
 
   %tbody
   - count_dossiers_termines_by_month.each do |date, count|
-    - matching_archive = archives.find { |archive| archive.time_span_type == 'monthly' && archive.month == date.month }
+    - matching_archive = archives.find { |archive| archive.time_span_type == 'monthly' && archive.month == date }
     - weight = estimate_weight(matching_archive, count, average_dossier_weight)
 
     %tr
diff --git a/spec/views/shared/archives/_table.html.haml_spec.rb b/spec/views/shared/archives/_table.html.haml_spec.rb
index 298603b34..1d4436dc1 100644
--- a/spec/views/shared/archives/_table.html.haml_spec.rb
+++ b/spec/views/shared/archives/_table.html.haml_spec.rb
@@ -17,7 +17,7 @@ RSpec.describe 'shared/archives/_table.html.haml', type: :view do
     it 'renders archive by month with estimate_weight' do
       expect(subject).to have_text("Janvier 2022")
       expect(subject).to have_text("Télécharger")
-      expect(subject).to have_text("5 ko")
+      expect(subject).to have_text("338 ko")
     end
   end