diff --git a/lib/server.js b/lib/server.js
index a81e3715..18970333 100644
--- a/lib/server.js
+++ b/lib/server.js
@@ -41,7 +41,7 @@
             socket: io.listen(server)
         }));
         
-        if (port <= 0 || port > 65535)
+        if (port < 1 || port > 65535)
             exit('cloudcmd --port: %s', 'port number could be 1..65535');
         
         server.on('error', function(error) {