diff --git a/lib/channel.js b/lib/channel.js
index 45b6d733..d29281df 100644
--- a/lib/channel.js
+++ b/lib/channel.js
@@ -2691,7 +2691,7 @@ Channel.prototype.handleUpdateOptions = function (user, data) {
     }
 
     if ("maxlength" in data) {
-        var ml = parseInt(data.maxlength);
+        var ml = util.parseTime(data.maxlength);
         if (isNaN(ml) || ml < 0) {
             ml = 0;
         }
@@ -2723,7 +2723,7 @@ Channel.prototype.handleUpdateOptions = 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;
         }
diff --git a/lib/utilities.js b/lib/utilities.js
index afdafe03..0aea2a1e 100644
--- a/lib/utilities.js
+++ b/lib/utilities.js
@@ -10,7 +10,7 @@
     if (typeof require === "function") {
         crypto = require("crypto");
     }
-    
+
     var Set = function (items) {
         this._items = {};
         var self = this;
@@ -115,6 +115,23 @@
         return [h, m, s].join(":");
     },
 
+    root.parseTime = function (time) {
+        var parts = time.split(":");
+        var seconds = 0;
+        switch (parts.length) {
+            case 3:
+                seconds += parseInt(parts[2]) * 3600;
+            case 2:
+                seconds += parseInt(parts[1]) * 60;
+            case 1:
+                seconds += parseInt(parts[0]);
+                break;
+            default:
+                break;
+        }
+        return seconds;
+    },
+
     root.newRateLimiter = function () {
         return {
             count: 0,