diff --git a/htdocs/langs/en_US/admin.lang b/htdocs/langs/en_US/admin.lang
index 3e6814f671b..413626b5178 100644
--- a/htdocs/langs/en_US/admin.lang
+++ b/htdocs/langs/en_US/admin.lang
@@ -248,7 +248,7 @@ DoTestSend=Test sending
 DoTestSendHTML=Test sending HTML
 ErrorCantUseRazInStartedYearIfNoYearMonthInMask=Error, can't use option @ if sequence {yy}{mm} or {yyyy}{mm} is not in mask.
 UMask=UMask parameter for new files on Unix/Linux/BSD file system.
-UMaskExplanation=This parameter allow you to define permissions set by default on files created by Dolibarr on server (during upload for example).<br>It must be the octal value (for example, 0666 means read and write for everyone).<br>Ce paramètre ne sert pas sous un serveur Windows.
+UMaskExplanation=This parameter allow you to define permissions set by default on files created by Dolibarr on server (during upload for example).<br>It must be the octal value (for example, 0666 means read and write for everyone).<br>This parameter is useless on a Windows server.
 SeeWikiForAllTeam=Take a look at the wiki page for full list of all actors and their organisation
 UseACacheDelay = Delay for caching export response in seconds (0 or empty for no cache)
 DisableLinkToHelpCenter=Hide link "<b>Need help or support</b>" on login page