diff --git a/htdocs/master.inc.php b/htdocs/master.inc.php
index 38906d57026..76e4b3e82d2 100644
--- a/htdocs/master.inc.php
+++ b/htdocs/master.inc.php
@@ -349,7 +349,7 @@ if (isset($conf->global->MAIN_DISABLE_JAVASCRIPT)) $conf->use_javascript=! $conf
 
 // conf->use_popup_calendar
 $conf->use_popup_calendar=1;
-if (isset($conf->global->MAIN_DISABLE_POPUP_CALENDAR)) $conf->use_popup_calendar=! $conf->global->MAIN_DISABLE_JAVASCRIPT;
+if (isset($conf->global->MAIN_DISABLE_POPUP_CALENDAR)) $conf->use_popup_calendar=! $conf->global->MAIN_DISABLE_POPUP_CALENDAR;
 
 // conf->monnaie
 if (! $conf->global->MAIN_MONNAIE) $conf->global->MAIN_MONNAIE='EUR';