1 files changed, 5 insertions, 2 deletions
diff --git a/common/content/autocommands.js b/common/content/autocommands.js
index 08355e16..95464e0c 100644
--- a/common/content/autocommands.js
+++ b/common/content/autocommands.js
@@ -10,10 +10,13 @@
 
 var AutoCommand = Struct("event", "filter", "command");
 update(AutoCommand.prototype, {
-    eventName: Class.Memoize(function () this.event.toLowerCase()),
+    eventName: Class.Memoize(function () {
+        return this.event.toLowerCase();
+    }),
 
     match: function (event, pattern) {
-        return (!event || this.eventName == event.toLowerCase()) && (!pattern || String(this.filter) === String(pattern));
+        return (!event || this.eventName == event.toLowerCase()) &&
+               (!pattern || String(this.filter) === String(pattern));
     }
 });