diff --git a/library/think/App.php b/library/think/App.php
index f6ed5fdf..6f2d7558 100644
--- a/library/think/App.php
+++ b/library/think/App.php
@@ -492,7 +492,7 @@ class App
                 $dir   = CONF_PATH . $module . 'extra';
                 $files = scandir($dir);
                 foreach ($files as $file) {
-                    if (strpos($file, CONF_EXT)) {
+                    if (pathinfo($file, PATHINFO_EXTENSION) === CONF_EXT) {
                         $filename = $dir . DS . $file;
                         Config::load($filename, pathinfo($file, PATHINFO_FILENAME));
                     }