diff --git a/ext_localconf.php b/ext_localconf.php
index 761c30f5dac72724b1bf9d0a7f11b69e57d6cbbb..12384ac98d5107fdeb3c4c7a76a88e8e10afcc2f 100644
--- a/ext_localconf.php
+++ b/ext_localconf.php
@@ -101,7 +101,7 @@ call_user_func(
 			['className' => \SGalinski\SgNews\Xclass\PageRenderer::class];
 
 		# Hook to add the "go to News Module Button
-		if (!is_array($GLOBALS['TYPO3_CONF_VARS']['SC_OPTIONS']['cms/layout/db_layout.php']['drawHeaderHook'])) {
+		if (!isset($GLOBALS['TYPO3_CONF_VARS']['SC_OPTIONS']['cms/layout/db_layout.php']['drawHeaderHook'])) {
 			$GLOBALS['TYPO3_CONF_VARS']['SC_OPTIONS']['cms/layout/db_layout.php']['drawHeaderHook'] = [];
 		}
 		$GLOBALS['TYPO3_CONF_VARS']['SC_OPTIONS']['cms/layout/db_layout.php']['drawHeaderHook'][] =