diff --git a/src/locale/messages.en.json b/src/locale/messages.en.json
index 82ddc5098382fc95b9c911bdefed13a4bb3012a8..c86e752fd7711aac25faacc71cd5e6d22497f74a 100644
--- a/src/locale/messages.en.json
+++ b/src/locale/messages.en.json
@@ -110,6 +110,7 @@
     "INFO_EXTRARES_LIB_YF": "Subcritical depth (m)",
     "INFO_EXTRARES_LIB_YN": "Normal depth (m)",
     "INFO_EXTRARES_LIB_YT": "Supercritical depth (m)",
+    "INFO_EXTRARES_LIB_ZRB": "Downstream basin bottom elevation (m)",
     "INFO_EXTRARES_LIB_ZF2": "Downstream bottom elevation (m)",
     "INFO_LECHAPTCALMON_TITRE": "Lechapt-Calmon",
     "INFO_LECHAPTCALMON_TITRE_COURT": "Lechapt-Calmon",
diff --git a/src/locale/messages.fr.json b/src/locale/messages.fr.json
index 63b5167de6d3962dd4c327b55236a26015d0fb04..3ed8fc2a518e3e7796f5c64f6cb4b001b1eccb01 100644
--- a/src/locale/messages.fr.json
+++ b/src/locale/messages.fr.json
@@ -110,6 +110,7 @@
     "INFO_EXTRARES_LIB_YF": "Tirant d'eau fluvial (m)",
     "INFO_EXTRARES_LIB_YN": "Tirant d'eau normal (m)",
     "INFO_EXTRARES_LIB_YT": "Tirant d'eau torrentiel (m)",
+    "INFO_EXTRARES_LIB_ZRB": "Cote de radier du bassin aval (m)",
     "INFO_EXTRARES_LIB_ZF2": "Cote de fond aval (m)",
     "INFO_LECHAPTCALMON_TITRE": "Lechapt-Calmon",
     "INFO_LECHAPTCALMON_TITRE_COURT": "Lechapt-Calmon",