diff --git a/src/app/calculators/rugofond/config.json b/src/app/calculators/rugofond/config.json
index e75940758db9b22496e5c710919a995e3f0565ef..38289c769ead0cf9a196a595d314a941e0b08b70 100644
--- a/src/app/calculators/rugofond/config.json
+++ b/src/app/calculators/rugofond/config.json
@@ -18,10 +18,7 @@
             },
             "CdT",
             "d65",
-            {
-                "id": "Ks",
-                "help": "pam/macrorugo.html#rugosite-de-fond"
-            }
+            "a"
         ]
     },
     {
diff --git a/src/app/calculators/rugofond/en.json b/src/app/calculators/rugofond/en.json
index c986c8f6eb48f7d51f0310d1109f7e1fb4c8f310..a075a10413f1dcb029d0a1010794344ce890b44a 100644
--- a/src/app/calculators/rugofond/en.json
+++ b/src/app/calculators/rugofond/en.json
@@ -11,7 +11,7 @@
     "select_passtype": "Pass type",
     "Q": "Flow",
     "If": "Slope",
-    "Ks": "Bottom roughness",
+    "a": "Stickler correction factor",
     "ZF1": "Upstream ramp bottom elevation",
     "ZD1": "Lower upstream ramp bottom elevation",
     "ZR1": "Upper upstream ramp bottom elevation",
diff --git a/src/app/calculators/rugofond/fr.json b/src/app/calculators/rugofond/fr.json
index 68680d0541a2adbef86c51501c3a8004c4490302..f6883198cdb64ed2671d6d0c40f214eb25fbc8d7 100644
--- a/src/app/calculators/rugofond/fr.json
+++ b/src/app/calculators/rugofond/fr.json
@@ -11,7 +11,7 @@
     "select_passtype": "Type de passe",
     "Q": "Débit",
     "If": "Pente",
-    "Ks": "Rugosité de fond",
+    "a": "Coefficient correcteur du Strickler",
     "ZF1": "Cote de fond amont rampe",
     "ZD1": "Cote de fond bas amont rampe",
     "ZR1": "Cote de fond haut amont rampe",
@@ -20,6 +20,6 @@
     "CdT": "Coefficient de débit",
     "d65": "d65",
     
-    "PASSTYPE_0": "Radier hotizontal",
+    "PASSTYPE_0": "Radier horizontal",
     "PASSTYPE_1": "Radier incliné"
 }
\ No newline at end of file