diff --git a/htdocs/langs/en_US/projects.lang b/htdocs/langs/en_US/projects.lang
index 5fc813d0f4d..43441c71f02 100755
--- a/htdocs/langs/en_US/projects.lang
+++ b/htdocs/langs/en_US/projects.lang
@@ -18,6 +18,7 @@ Mytasks=My tasks
 Tasks=Tasks
 Task=Task
 NewTask=New task
+AddDuration=Add duration
 Activity=Activity
 MyActivity=My activity
 DurationEffective=Effective duration
diff --git a/htdocs/langs/fr_FR/projects.lang b/htdocs/langs/fr_FR/projects.lang
index 765f0c145e6..cff69b56b60 100755
--- a/htdocs/langs/fr_FR/projects.lang
+++ b/htdocs/langs/fr_FR/projects.lang
@@ -18,6 +18,7 @@ Mytasks=Mes t
 Tasks=Tâches
 Task=Tâche
 NewTask=Nouvelle tâche
+AddDuration=Ajouter la durée
 Activity=Activité
 MyActivity=Mon activité
 DurationEffective=Durée effective