diff --git a/plugins/shortcode-custom/Prismjsshroot.php b/plugins/shortcode-custom/Prismjsshroot.php
index 92da6db..adf9ee1 100644
--- a/plugins/shortcode-custom/Prismjsshroot.php
+++ b/plugins/shortcode-custom/Prismjsshroot.php
@@ -8,8 +8,8 @@ class Prismjsshroot extends Shortcode
     public function init()
     {
         $this->shortcode->getRawHandlers()->add('shroot', function(ShortcodeInterface $sc) {
-            $content = preg_replace('/^```.*(\n)?$/m', '', $content);
-            $content = trim($sc->getContent());
+            $content = preg_replace('/^```.*(\n)?$/m', '', $sc->getContent());
+            $content = trim($content);
             return '<pre class="command-line language-sh" data-prompt="#" data-continuation-str="\" tabindex="0"><code class="language-sh">'.$content.'</code></pre>';
         });
     }