diff --git a/lib/tasks/data_fixer.rake b/lib/tasks/data_fixer.rake
index b7b53fe65..19d70d9b8 100644
--- a/lib/tasks/data_fixer.rake
+++ b/lib/tasks/data_fixer.rake
@@ -26,4 +26,19 @@ namespace :data_fixer do
       end
     end
   end
+
+  desc <<~EOD
+    Given a dossier_id in argument, run the DossierChampsMissing.
+    ex: rails data_fixer:dossier_missing_champ\[1\]
+  EOD
+  task :dossier_missing_champ, [:dossier_id] => :environment do |_t, args|
+    dossier = Dossier.find(args[:dossier_id])
+    result = DataFixer::DossierChampsMissing.new(dossier:).fix
+
+    if result > 0
+      rake_puts "Dossier#[#{args[:dossier_id]}] fixed"
+    else
+      rake_puts "Dossier#[#{args[:dossier_id]}] not fixed"
+    end
+  end
 end