diff --git a/scan.php b/scan.php
index a1e4074..78e3259 100644
--- a/scan.php
+++ b/scan.php
@@ -820,11 +820,12 @@ class MalwareScanner
     {
         $ctx = stream_context_create(array('http' => array('timeout' => 30)));
 
-        $latest_hash = trim(file_get_contents($url . '/database/compressed.sha256', false, $ctx));
+        $latest_hash = file_get_contents($url . '/database/compressed.sha256', false, $ctx);
         if ($latest_hash === false) {
             $this->error('Unable to download database checksum');
             return false;
         }
+        $latest_hash = trim($latest_hash);
 
         $file = __DIR__ . '/whitelist.dat';
         if (is_readable($file)) {