diff --git a/lib/rack/arachni-vectorfeed.rb b/lib/rack/arachni-vectorfeed.rb
index d42e2ce..b626292 100644
--- a/lib/rack/arachni-vectorfeed.rb
+++ b/lib/rack/arachni-vectorfeed.rb
@@ -112,7 +112,7 @@ def extract_headers( env )
         def vector_tpl( env )
             vector = {
                 'method' => env['REQUEST_METHOD'].downcase,
-                'action' => env['rack.url_scheme'] + '//' + env['HTTP_HOST'] +
+                'action' => env['rack.url_scheme'] + '://' + env['HTTP_HOST'] +
                     env['REQUEST_URI']
             }
         end