diff --git a/components/checks/passive/grep/x_frame_options.rb b/components/checks/passive/grep/x_frame_options.rb
index 0c579099cb..13b14ad385 100644
--- a/components/checks/passive/grep/x_frame_options.rb
+++ b/components/checks/passive/grep/x_frame_options.rb
@@ -12,7 +12,8 @@ class Arachni::Checks::XFrameOptions < Arachni::Check::Base
     def run
         return if audited?( page.parsed_url.host ) ||
             page.response.headers.empty? ||
-            page.response.headers['X-Frame-Options'] || page.code != 200
+            !page.response.headers['X-Frame-Options'].to_s.empty? || page.code != 200
+
         audited( page.parsed_url.host )
 
         log(