diff --git a/htdocs/langs/en_US/admin.lang b/htdocs/langs/en_US/admin.lang
index 26804a25113..4543711d63e 100644
--- a/htdocs/langs/en_US/admin.lang
+++ b/htdocs/langs/en_US/admin.lang
@@ -737,7 +737,7 @@ DisplayDesc=You can choose each parameter related to the Dolibarr look and feel
 AvailableModules=Available modules
 ToActivateModule=To activate modules, go on setup Area (Home->Setup->Modules).
 SessionTimeOut=Time out for session
-SessionExplanation=This number guarantee that session will never expire before this delay. But PHP sessoin management does not guaranty that session always expire after this delay: This occurs if a system to clean cache session is running.<br>Note: with no particular system, internal PHP process will clean session every about <b>%s/%s</b> access but only during access made by other sessions. 
+SessionExplanation=This number guarantee that session will never expire before this delay. But PHP session management does not guaranty that session always expire after this delay: This occurs if a system to clean cache session is running.<br>Note: with no particular system, internal PHP process will clean session every about <b>%s/%s</b> access but only during access made by other sessions. 
 TriggersAvailable=Available triggers
 TriggersDesc=Triggers are files that will modify the behaviour of Dolibarr workflow once copied into the directory <b>htdocs/includes/triggers</b>. They realised new actions, activated on Dolibarr events (new company creation, invoice validation, ...).
 TriggerDisabledByName=Triggers in this file are disabled by the <b>-NORUN</b> suffix in their name.