diff --git a/htdocs/core/lib/functions.lib.php b/htdocs/core/lib/functions.lib.php
index 06bd44ed345..e213466b58a 100644
--- a/htdocs/core/lib/functions.lib.php
+++ b/htdocs/core/lib/functions.lib.php
@@ -1985,7 +1985,7 @@ function dol_print_date($time, $format = '', $tzoutput = 'auto', $outputlangs =
 	global $conf, $langs;
 
 	if ($tzoutput === 'auto') {
-		$tzoutput = (empty($conf) ? 'tzserver' : (isset($conf->tzuserinputkey)?$conf->tzuserinputkey:'tzserver'));
+		$tzoutput = (empty($conf) ? 'tzserver' : (isset($conf->tzuserinputkey) ? $conf->tzuserinputkey : 'tzserver'));
 	}
 
 	// Clean parameters