diff --git a/CHANGELOG b/CHANGELOG
index 180ea4104..ee5c7053e 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,3 +1,5 @@
+* Treat a 304 HTTP status as a successful response. [#331 state:resolved] (Kenneth Kin Lum, Andrew Dupont)
+
 * Handle sparse arrays properly in `Array#_each` to match behavior with browsers' built-in `Array#forEach` (and ES5). [#790 state:resolved] (Andriy Tyurnikov, Yaffle, Andrew Dupont)
 
 * Make `Event.extend` work with legacy IE events in IE 9. (Andrew Dupont)
diff --git a/src/ajax/request.js b/src/ajax/request.js
index 82d504f90..f50ece62f 100644
--- a/src/ajax/request.js
+++ b/src/ajax/request.js
@@ -270,7 +270,7 @@ Ajax.Request = Class.create(Ajax.Base, {
   **/
   success: function() {
     var status = this.getStatus();
-    return !status || (status >= 200 && status < 300);
+    return !status || (status >= 200 && status < 300) || status == 304;
   },
 
   getStatus: function() {