diff --git a/htdocs/langs/en_US/main.lang b/htdocs/langs/en_US/main.lang
index 850d87ff883..b17c3d8b8c5 100644
--- a/htdocs/langs/en_US/main.lang
+++ b/htdocs/langs/en_US/main.lang
@@ -266,8 +266,10 @@ DateStart=Start date
 DateEnd=End date
 DateCreation=Creation date
 DateCreationShort=Creat. date
+IPCreation=Creation IP
 DateModification=Modification date
 DateModificationShort=Modif. date
+IPModification=Modification IP
 DateLastModification=Latest modification date
 DateValidation=Validation date
 DateClosing=Closing date