diff --git a/src/app/calculators/rugofondmultiple/config.json b/src/app/calculators/rugofondmultiple/config.json
index 44639f1280695d22236c5207e52ff1fa89d6190d..a48accba61e58da9efbd2d4700140ba40df106c0 100644
--- a/src/app/calculators/rugofondmultiple/config.json
+++ b/src/app/calculators/rugofondmultiple/config.json
@@ -37,11 +37,11 @@
                 "property": "rugofondType"
             },
             {
-                "id": "ZRR",
+                "id": "ZRH",
                 "allowEmpty": true
             },
             {
-                "id": "ZRL",
+                "id": "ZRB",
                 "allowEmpty": true
             },
             {
diff --git a/src/app/calculators/rugofondmultiple/en.json b/src/app/calculators/rugofondmultiple/en.json
index f341352609119d0d0def9a1b27416c2ce3b06715..54f8187ed08c3da607f85bab1ad1400de833552f 100644
--- a/src/app/calculators/rugofondmultiple/en.json
+++ b/src/app/calculators/rugofondmultiple/en.json
@@ -14,8 +14,8 @@
     "If": "Slope",
     "a": "Strickler correction factor",
     "ZF1": "Upstream ramp bottom elevation",
-    "ZRR": "Upper upstream ramp bottom elevation",
-    "ZRL": "Lower upstream ramp bottom elevation",
+    "ZRH": "Upper upstream ramp bottom elevation",
+    "ZRB": "Lower upstream ramp bottom elevation",
     "NbT": "Number of flow sections",
     "L": "Total width of ramp",
     "Cd": "Discharge coefficient",
diff --git a/src/app/calculators/rugofondmultiple/fr.json b/src/app/calculators/rugofondmultiple/fr.json
index 95b7744ff3d5f3ace2cab383be27a55f08b69921..725789fdd2cc22192dc31bf25687c189a38beb56 100644
--- a/src/app/calculators/rugofondmultiple/fr.json
+++ b/src/app/calculators/rugofondmultiple/fr.json
@@ -14,8 +14,8 @@
     "If": "Pente",
     "a": "Coefficient correcteur du Strickler",
     "ZF1": "Cote de fond amont rampe",
-    "ZRR": "Cote de fond haut amont",
-    "ZRL": "Cote de fond bas amont",
+    "ZRH": "Cote de fond haut amont",
+    "ZRB": "Cote de fond bas amont",
     "NbT": "Nombre de tranche d'écoulement",
     "L": "Largeur totale de la rampe", 
     "Cd": "Coefficient de débit",