diff --git a/lib/vmpooler/api/helpers.rb b/lib/vmpooler/api/helpers.rb
index 3c9f487..e4b2302 100644
--- a/lib/vmpooler/api/helpers.rb
+++ b/lib/vmpooler/api/helpers.rb
@@ -18,7 +18,7 @@ module Vmpooler
 
       def validate_token(backend)
         if valid_token?(backend)
-          backend.hset("vmpooler__token__#{request.env['HTTP_X_AUTH_TOKEN']}last#{Time.now}")
+          backend.hset("vmpooler__token__#{request.env['HTTP_X_AUTH_TOKEN']}", 'last', Time.now)
 
           return true
         end