diff --git a/src/app/calculators/pressureloss/en.json b/src/app/calculators/pressureloss/en.json
index 614765523275396eeb4389212881d3a5b12a6aca..238ce4911f254eb944394648f20f4a72d7f5de13 100644
--- a/src/app/calculators/pressureloss/en.json
+++ b/src/app/calculators/pressureloss/en.json
@@ -27,6 +27,7 @@
     "Jlin": "Linear head loss",
     "Klin": "Linear head loss coefficient",
     "fD": "Darcy friction factor",
+    "Ks": "Strickler coefficient",
 
     "UNIT_JLIN": "m",
     "UNIT_V": "m/s"
diff --git a/src/app/calculators/pressureloss/fr.json b/src/app/calculators/pressureloss/fr.json
index 1d92a6153640735deff605674149284f9f1a3e56..fd1bd9c2ff98254fba30dbb457da7c4cfa6a4a98 100644
--- a/src/app/calculators/pressureloss/fr.json
+++ b/src/app/calculators/pressureloss/fr.json
@@ -27,6 +27,7 @@
     "Jlin": "Perte de charge linéaire",
     "Klin": "Coefficient de perte de charge linéaire",
     "fD": "Coefficient de perte de charge de Darcy",
+    "Ks": "Coefficient de Strickler",
 
     "UNIT_JLIN": "m",
     "UNIT_V": "m/s"
diff --git a/src/locale/messages.en.json b/src/locale/messages.en.json
index 5130406b10e0cdde1994abc35bd303f2fbe46ceb..b7b836bd09864cbe81f26ff922b9d154c1a98a70 100755
--- a/src/locale/messages.en.json
+++ b/src/locale/messages.en.json
@@ -234,6 +234,7 @@
     "INFO_CHILD_TYPE_SECTION_PLUR": "sections",
     "INFO_CHILD_TYPE_SECTION_SHORT": "S",
     "INFO_CHILD_TYPE_LECHAPTCALMON": "Lechapt-Calmon",
+    "INFO_CHILD_TYPE_STRICKLER": "Strickler",
     "INFO_DIALOG_PARSIM_DESC": "Choose a combination of values to generate the simulation",
     "INFO_FIELDSET_ADD": "Add",
     "INFO_FIELDSET_COPY": "Copy",
diff --git a/src/locale/messages.fr.json b/src/locale/messages.fr.json
index f487a29c09e7be331d0a10127319874b86a20b55..1b2892173b6f6383f61f07fac4766fbc1288b0b5 100755
--- a/src/locale/messages.fr.json
+++ b/src/locale/messages.fr.json
@@ -234,6 +234,7 @@
     "INFO_CHILD_TYPE_SECTION_PLUR": "sections",
     "INFO_CHILD_TYPE_SECTION_SHORT": "S",
     "INFO_CHILD_TYPE_LECHAPTCALMON": "Lechapt-Calmon",
+    "INFO_CHILD_TYPE_STRICKLER": "Strickler",
     "INFO_DIALOG_PARSIM_DESC": "Choisir une combinaison de valeurs pour générer la simulation",
     "INFO_FIELDSET_ADD": "Ajouter",
     "INFO_FIELDSET_COPY": "Copier",
@@ -773,4 +774,4 @@
     "ERROR_VERIF_PAB_WALL_NOT_CROSSABLE": "La cloison n°%N% n'est pas franchissable",
     "ERROR_VERIF_PAB_DW_NOT_CROSSABLE": "La cloison aval n'est pas franchissable",
     "WARNING_VERIF_PAR_SPECIES_GROUP": "Les groupes d'espèces 3a, 3b et 7b sont déconseillés pour ce type de passe"
-}
\ No newline at end of file
+}