diff --git a/4chan_x.user.js b/4chan_x.user.js
index 0ffda93e0..df437db9c 100644
--- a/4chan_x.user.js
+++ b/4chan_x.user.js
@@ -1616,7 +1616,7 @@
         }
       },
       interval: function() {
-        return conf['Interval'] = this.value = this.value.match(/\d+/)[0];
+        return conf['Interval'] = this.value = parseInt(this.value) || conf['Interval'];
       },
       update: function() {
         var arr, body, br, id, input, length, replies, reply, _i, _len, _ref, _ref2;
diff --git a/script.coffee b/script.coffee
index 2ed95abdc..4df5755f7 100644
--- a/script.coffee
+++ b/script.coffee
@@ -1320,7 +1320,7 @@ updater =
       else
         window.clearInterval updater.intervalID
     interval: ->
-      conf['Interval'] = @value = @value.match(/\d+/)[0]
+      conf['Interval'] = @value = parseInt(@value) or conf['Interval']
     update: ->
       if @status is 404
         updater.timer.textContent = ''