diff --git a/app/models/champs/departement_champ.rb b/app/models/champs/departement_champ.rb
index f197a58c4..ef86957ca 100644
--- a/app/models/champs/departement_champ.rb
+++ b/app/models/champs/departement_champ.rb
@@ -33,6 +33,10 @@ class Champs::DepartementChamp < Champs::TextChamp
     formatted_value
   end
 
+  def for_api
+    formatted_value
+  end
+
   def selected
     code
   end
diff --git a/spec/controllers/api/v1/dossiers_controller_spec.rb b/spec/controllers/api/v1/dossiers_controller_spec.rb
index 81f0f02b7..af705addd 100644
--- a/spec/controllers/api/v1/dossiers_controller_spec.rb
+++ b/spec/controllers/api/v1/dossiers_controller_spec.rb
@@ -120,6 +120,10 @@ describe API::V1::DossiersController do
   end
 
   describe 'GET show' do
+    before do
+      allow(APIGeoService).to receive(:departement_name).with('01').and_return('Ain')
+    end
+
     let(:retour) { get :show, params: { token: token, procedure_id: procedure_id, id: dossier_id } }
     subject { retour }
 
@@ -254,6 +258,18 @@ describe API::V1::DossiersController do
             end
           end
 
+          describe 'departement' do
+            let(:procedure) { create(:procedure, :with_departement, administrateur: admin) }
+            let(:dossier) { create(:dossier, :en_construction, :with_populated_champs, procedure: procedure) }
+
+            subject { super() }
+
+            it 'should have rows' do
+              expect(subject.size).to eq(1)
+              expect(subject.first[:value]).to eq("01 – Ain")
+            end
+          end
+
           describe 'repetition' do
             let(:procedure) { create(:procedure, :with_repetition, administrateur: admin) }
             let(:dossier) { create(:dossier, :en_construction, :with_populated_champs, procedure: procedure) }
diff --git a/spec/factories/procedure.rb b/spec/factories/procedure.rb
index cd947cf18..2af349302 100644
--- a/spec/factories/procedure.rb
+++ b/spec/factories/procedure.rb
@@ -199,6 +199,12 @@ FactoryBot.define do
       end
     end
 
+    trait :with_departement do
+      after(:build) do |procedure, _evaluator|
+        build(:type_de_champ_departements, procedure: procedure)
+      end
+    end
+
     trait :with_piece_justificative do
       after(:build) do |procedure, _evaluator|
         build(:type_de_champ_piece_justificative, procedure: procedure)