diff --git a/src/app/calculators/pressureloss/en.json b/src/app/calculators/pressureloss/en.json
index d2ffa6aebb0688f0e7b7ea528bb9f177c2457d0c..04967c221977927a2656573212cad6b2e39fa9bb 100644
--- a/src/app/calculators/pressureloss/en.json
+++ b/src/app/calculators/pressureloss/en.json
@@ -1,6 +1,8 @@
 {
     "fs_pressureloss_law": "Pressure loss",
     "select_pressurelosstype": "Pressure loss law",
+    "PRESSURELOSSTYPE_0": "Lechapt-Calmon",
+
     "fs_materiau": "Type of material",
     "select_material": "Choice of material",
     "MATERIAL_0": "Unlined cast iron - Coarse concrete (corrosive water)",
diff --git a/src/app/calculators/pressureloss/fr.json b/src/app/calculators/pressureloss/fr.json
index 17cde6a0283308548c2b4e873598bfae96587653..d1b06625fe5f454da3a08fe5ae00a749009eaa9b 100644
--- a/src/app/calculators/pressureloss/fr.json
+++ b/src/app/calculators/pressureloss/fr.json
@@ -1,6 +1,8 @@
 {
     "fs_pressureloss_law": "Perte de charge",
     "select_pressurelosstype": "Loi de perte de charge",
+    "PRESSURELOSSTYPE_0": "Lechapt-Calmon",
+
     "fs_materiau": "Type du matériau",
     "select_material": "Choix du matériau",
     "MATERIAL_0": "Fonte ou acier non revêtus - Béton grossier (eau corrosive)",