diff --git a/system/src/Grav/Common/Config.php b/system/src/Grav/Common/Config.php
index 876b13f40..484ed1763 100644
--- a/system/src/Grav/Common/Config.php
+++ b/system/src/Grav/Common/Config.php
@@ -232,9 +232,10 @@ class Config extends Data
         /** @var \DirectoryIterator $plugin */
         foreach ($iterator as $plugin) {
             $name = $plugin->getBasename();
-            $file = $plugin->getPathname() . DS . $name . YAML_EXT;
+            $dir = $plugin->getPathname() ;
+            $file = $dir . DS . $name . YAML_EXT;
 
-            if (!file_exists($file)) {
+            if (!(is_dir($dir) && is_file($file))) {
                 continue;
             }