diff --git a/app/models/restitution/export_positionnement.rb b/app/models/restitution/export_positionnement.rb
index baf5e06de..d08b4e651 100644
--- a/app/models/restitution/export_positionnement.rb
+++ b/app/models/restitution/export_positionnement.rb
@@ -70,7 +70,7 @@ def remplis_reponses_par_code(sheet, ligne, code, evenements)
     end
 
     def pourcentage_reussite(evenements)
-      scores = evenements.map { |e| [e.donnees['scoreMax'], e.donnees['score']] }
+      scores = evenements.map { |e| [e.donnees['scoreMax'] || 0, e.donnees['score'] || 0] }
       score_max, score = scores.transpose.map(&:sum)
       score_max.zero? ? 0 : (score * 100 / score_max).round
     end
diff --git a/spec/models/restitution/export_positionnement_spec.rb b/spec/models/restitution/export_positionnement_spec.rb
index 634efd5f5..4e460161a 100644
--- a/spec/models/restitution/export_positionnement_spec.rb
+++ b/spec/models/restitution/export_positionnement_spec.rb
@@ -49,6 +49,10 @@
                           score: 1,
                           scoreMax: 2,
                           metacompetence: 'renseigner_horaires' }
+        create :evenement_reponse,
+               partie: partie,
+               donnees: { question: 'LOdi3',
+                          metacompetence: 'parametres' }
         create :evenement_reponse,
                partie: partie,
                donnees: { intitule: intitule_question2,
@@ -80,7 +84,10 @@
         question2 = worksheet.row(4)
         expect(question2[0]).to be_nil
         question2 = worksheet.row(5)
-        expect(question2[0]).to eq('LOdi4')
+        expect(question2[0]).to eq('LOdi3')
+        question2 = worksheet.row(6)
+        expect(question2[3]).to be_nil
+        expect(question2[4]).to be_nil
         expect(question2[1]).to eq(intitule_question2)
         expect(question2[2]).to eq('Le chat de Mme Coupin')
         expect(question2[3]).to be_nil