diff --git a/htdocs/core/lib/functions.lib.php b/htdocs/core/lib/functions.lib.php
index e8d0cc3f254..5efbc507db9 100644
--- a/htdocs/core/lib/functions.lib.php
+++ b/htdocs/core/lib/functions.lib.php
@@ -724,7 +724,7 @@ function dol_get_fiche_head($links=array(), $active='0', $title='', $notab=0, $p
 	// Show tabs
 	$bactive=false;
 	// if =0 we don't use the feature
-	$limittoshow=($conf->global->MAIN_MAXTABS_IN_CARD?$conf->global->MAIN_MAXTABS_IN_CARD:99);
+	$limittoshow=(empty($conf->global->MAIN_MAXTABS_IN_CARD)?99:$conf->global->MAIN_MAXTABS_IN_CARD);
 	$displaytab=0;
 
 	for ($i = 0 ; $i <= $maxkey ; $i++)