diff --git a/src/3.2.1_mur.js b/src/3.2.1_mur.js
index 17ccdd8..db31067 100644
--- a/src/3.2.1_mur.js
+++ b/src/3.2.1_mur.js
@@ -134,7 +134,7 @@ export default function calc_mur(mur, zc, pc_id, ej) {
       break;
     case "année d'isolation différente de l'année de construction saisie justifiée (table forfaitaire)": {
       calc_umur0(di, de, du);
-      const pi_id = requestInputID(de, du, 'periode_isolation');
+      const pi_id = requestInputID(de, du, 'periode_isolation') || pc_id;
       tv_umur(di, de, du, pi_id, zc, ej);
       di.umur = Math.min(di.umur, di.umur0);
       break;
diff --git a/src/3.2.3_plancher_haut.js b/src/3.2.3_plancher_haut.js
index c948654..13f741d 100644
--- a/src/3.2.3_plancher_haut.js
+++ b/src/3.2.3_plancher_haut.js
@@ -122,7 +122,6 @@ export default function calc_ph(ph, zc, pc_id, ej) {
         }
       }
       calc_uph0(di, de, du);
-      const tv_uph_avant = de.tv_uph_id;
       tv_uph(di, de, du, pi_id, zc, ej);
       di.uph = Math.min(di.uph, di.uph0);
       break;
diff --git a/test/open3cl_tv.spec.js b/test/open3cl_misc.spec.js
similarity index 87%
rename from test/open3cl_tv.spec.js
rename to test/open3cl_misc.spec.js
index c637002..e8959bc 100644
--- a/test/open3cl_tv.spec.js
+++ b/test/open3cl_misc.spec.js
@@ -61,4 +61,14 @@ describe('Open3cl misc unit tests', () => {
 
     expect(output.logement.sortie.qualite_isolation.qualite_isol_plancher_bas).toBe(1);
   });
+
+  it('should have a valid tv_umur_if if no periode_isolation', () => {
+    const input = structuredClone(getAdemeFileJson('2421E0125604W'));
+    const inputTvMurId = input.logement.enveloppe.mur_collection.mur[0].donnee_entree.tv_umur_id;
+
+    const output = calcul_3cl(input);
+
+    const outputTvMurId = output.logement.enveloppe.mur_collection.mur[0].donnee_entree.tv_umur_id;
+    expect(inputTvMurId).toBe(outputTvMurId);
+  });
 });