diff --git a/app/lib/api_entreprise/exercices_adapter.rb b/app/lib/api_entreprise/exercices_adapter.rb
index fe024456a..4a0db763e 100644
--- a/app/lib/api_entreprise/exercices_adapter.rb
+++ b/app/lib/api_entreprise/exercices_adapter.rb
@@ -1,11 +1,13 @@
 class ApiEntreprise::ExercicesAdapter < ApiEntreprise::Adapter
-  def to_array
+  def to_params
     if data_source.present?
-      data_source[:exercices].map do |exercice|
+      exercices_array = data_source[:exercices].map do |exercice|
         exercice.slice(*attr_to_fetch)
       end
+
+      { exercices_attributes: exercices_array }
     else
-      []
+      {}
     end
   end
 
diff --git a/app/services/siret_service.rb b/app/services/siret_service.rb
index e0f6008c1..869039ea5 100644
--- a/app/services/siret_service.rb
+++ b/app/services/siret_service.rb
@@ -7,12 +7,12 @@ class SIRETService
 
     if etablissement_params.present? && entreprise_params.present?
       association_params = ApiEntreprise::RNAAdapter.new(siret, procedure_id).to_params
-      exercices_array = ApiEntreprise::ExercicesAdapter.new(siret, procedure_id).to_array
+      exercices_params = ApiEntreprise::ExercicesAdapter.new(siret, procedure_id).to_params
 
       params = etablissement_params
         .merge(entreprise_params.transform_keys { |k| "entreprise_#{k}" })
         .merge(association_params.transform_keys { |k| "association_#{k}" })
-        .merge(exercices_attributes: exercices_array)
+        .merge(exercices_params)
 
       # This is to fill legacy models and relationships
       if dossier.present?
diff --git a/spec/lib/api_entreprise/exercices_adapter_spec.rb b/spec/lib/api_entreprise/exercices_adapter_spec.rb
index 591a8e395..4feec27da 100644
--- a/spec/lib/api_entreprise/exercices_adapter_spec.rb
+++ b/spec/lib/api_entreprise/exercices_adapter_spec.rb
@@ -3,32 +3,32 @@ require 'spec_helper'
 describe ApiEntreprise::ExercicesAdapter do
   let(:siret) { '41816609600051' }
   let(:procedure_id) { 11 }
-  subject { described_class.new(siret, procedure_id).to_array }
+  subject { described_class.new(siret, procedure_id).to_params }
 
   before do
     stub_request(:get, /https:\/\/staging.entreprise.api.gouv.fr\/v2\/exercices\/.*token=/)
       .to_return(body: File.read('spec/support/files/exercices.json', status: 200))
   end
 
-  it '#to_array class est un Array ?' do
-    expect(subject).to be_an_instance_of(Array)
+  it '#to_params class est un Hash ?' do
+    expect(subject).to be_an_instance_of(Hash)
   end
 
   it 'have 3 exercices' do
-    expect(subject.size).to eq(3)
+    expect(subject[:exercices_attributes].size).to eq(3)
   end
 
   context 'Attributs Exercices' do
     it 'L\'exercice contient bien un ca' do
-      expect(subject[0][:ca]).to eq('21009417')
+      expect(subject[:exercices_attributes][0][:ca]).to eq('21009417')
     end
 
     it 'L\'exercice contient bien une date de fin d\'exercice' do
-      expect(subject[0][:date_fin_exercice]).to eq("2013-12-31T00:00:00+01:00")
+      expect(subject[:exercices_attributes][0][:date_fin_exercice]).to eq("2013-12-31T00:00:00+01:00")
     end
 
     it 'L\'exercice contient bien une date_fin_exercice_timestamp' do
-      expect(subject[0][:date_fin_exercice_timestamp]).to eq(1388444400)
+      expect(subject[:exercices_attributes][0][:date_fin_exercice_timestamp]).to eq(1388444400)
     end
   end
 end