diff --git a/set_background.php b/set_background.php
index 7cae7c7..a447dca 100644
--- a/set_background.php
+++ b/set_background.php
@@ -2,7 +2,7 @@
   function scanAllDir($dir) {
     $result = [];
     foreach(scandir($dir) as $filename) {
-      if ($filename[0] === '.') continue;
+      if ($filename[0] == '.') continue;
       $filePath = $dir . '/' . $filename;
       if (is_dir($filePath)) {
         foreach (scanAllDir($filePath) as $childFilename) {