diff --git a/4chan_x.user.js b/4chan_x.user.js
index ad8177618..f20ab7e2a 100644
--- a/4chan_x.user.js
+++ b/4chan_x.user.js
@@ -528,15 +528,16 @@
     regexps: {},
     callbacks: [],
     init: function() {
-      var filter, key, m, _i, _len;
+      var f, filter, key, m, _i, _len;
       for (key in config.filter) {
-        if (!(m = conf[key].match(/^(\/.+\/\w{0,})$/gm))) {
+        if (!(m = conf[key].match(/^\/.+\/\w*$/gm))) {
           continue;
         }
         this.regexps[key] = [];
         for (_i = 0, _len = m.length; _i < _len; _i++) {
           filter = m[_i];
-          this.regexps[key].push(Function("return " + filter)());
+          f = filter.match(/^\/(.+)\/(\w*)$/);
+          this.regexps[key].push(RegExp(f[1], f[2]));
         }
         if (this.regexps[key].length) {
           this.callbacks.push(this[key]);
diff --git a/script.coffee b/script.coffee
index 55ec87894..e6d206747 100644
--- a/script.coffee
+++ b/script.coffee
@@ -386,11 +386,12 @@ filter =
   callbacks: []
   init: ->
     for key of config.filter
-      unless m = conf[key].match /^(\/.+\/\w{0,})$/gm
+      unless m = conf[key].match /^\/.+\/\w*$/gm
         continue
       @regexps[key] = []
       for filter in m
-        @regexps[key].push Function("return #{filter}")()
+        f = filter.match /^\/(.+)\/(\w*)$/
+        @regexps[key].push RegExp f[1], f[2]
       #only execute what's filterable
       @callbacks.push @[key] if @regexps[key].length