diff --git a/src/Symfony/Bundle/FrameworkBundle/Templating/Helper/CodeHelper.php b/src/Symfony/Bundle/FrameworkBundle/Templating/Helper/CodeHelper.php
index df8b0501a7..ef24fe8f69 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Templating/Helper/CodeHelper.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Templating/Helper/CodeHelper.php
@@ -143,6 +143,15 @@ class CodeHelper extends Helper
     public function fileExcerpt($file, $line)
     {
         if (is_readable($file)) {
+            if (extension_loaded('fileinfo')) {
+                $finfo = new \Finfo();
+
+                // Check if the file is an application/octet-stream (eg. Phar file) because hightlight_file cannot parse these files
+                if ('application/octet-stream' === $finfo->file($file, FILEINFO_MIME_TYPE)) {
+                    return;
+                }
+            }
+
             $code = highlight_file($file, true);
             // remove main code/span tags
             $code = preg_replace('#^<code.*?>\s*<span.*?>(.*)</span>\s*</code>#s', '\\1', $code);