diff --git a/lib/channel/opts.js b/lib/channel/opts.js
index 6fe0e8e5..7590972d 100644
--- a/lib/channel/opts.js
+++ b/lib/channel/opts.js
@@ -152,7 +152,7 @@ OptionsModule.prototype.handleSetOptions = function (user, data) {
             b = 1;
         }
 
-        var s = parseInt(data.chat_antiflood_params.sustained);
+        var s = parseFloat(data.chat_antiflood_params.sustained);
         if (isNaN(s) || s <= 0) {
             s = 1;
         }