diff --git a/phpBB/includes/functions_module.php b/phpBB/includes/functions_module.php
index 5a8ac276cd..85ff41500f 100644
--- a/phpBB/includes/functions_module.php
+++ b/phpBB/includes/functions_module.php
@@ -499,7 +499,7 @@ class p_master
 		$module_dir = explode('_', get_class($this->module));
 
 		// 0 phpbb, 1 ext, 2 vendor, 3 extension name, ...
-		if (!is_null($this->style) && isset($module_dir[3]) && $module_dir[1] === 'ext')
+		if (isset($module_dir[3]) && $module_dir[1] === 'ext')
 		{
 			$module_style_dir = 'ext/' . $module_dir[2] . '/' . $module_dir[3] . '/styles';