diff --git a/htdocs/index.php b/htdocs/index.php
index 0754d297606..debdec757cb 100644
--- a/htdocs/index.php
+++ b/htdocs/index.php
@@ -464,7 +464,7 @@ if (empty($conf->global->MAIN_DISABLE_GLOBAL_WORKBOARD)) {
 					$globalStatsKey = $groupElement['globalStatsKey'];
 					$groupElement['globalStats'] = array();
 
-					if (is_array($keys) && in_array($globalStatsKey, $keys)) {
+					if (isset($keys) && is_array($keys) && in_array($globalStatsKey, $keys)) {
 						// get key index of stats used in $includes, $classes, $keys, $icons, $titres, $links
 						$keyIndex = array_search($globalStatsKey, $keys);