diff --git a/web/webkit/src/main/scala/net/liftweb/http/LiftServlet.scala b/web/webkit/src/main/scala/net/liftweb/http/LiftServlet.scala
index 09808ba64b..477bf910be 100644
--- a/web/webkit/src/main/scala/net/liftweb/http/LiftServlet.scala
+++ b/web/webkit/src/main/scala/net/liftweb/http/LiftServlet.scala
@@ -614,12 +614,6 @@ class LiftServlet extends Loggable {
       case Full(handlerVersion) =>
         val renderVersion = RenderVersion.get
 
-        // An Empty in toReturn indicates there is no precomputed response for
-        // this AJAX request/version. Note that runAjax returns a
-        // Box[LiftResponse]. So we can have a Full(Empty) that indicates
-        // runAjax has computed a response, and that response was an Empty.
-        // That's why we have a double Box here. If we get an Empty back,
-        // we compute the actual response by calling runAjax below.
         val toReturn: Box[Box[LiftResponse]] =
           liftSession.withAjaxRequests { currentAjaxRequests =>
             currentAjaxRequests.get(renderVersion).collect {
@@ -632,7 +626,7 @@ class LiftServlet extends Loggable {
                   (renderVersion ->
                     AjaxRequestInfo(handlerVersion, Empty, cont :: Nil, millis))
 
-                Empty
+                Empty // no response available, triggers the actual AJAX computation below
 
               case AjaxRequestInfo(storedVersion, existingResponseBox @ Full(_), _, _) =>
                 existingResponseBox // return the Full response Box
@@ -650,7 +644,7 @@ class LiftServlet extends Loggable {
                 (renderVersion ->
                   AjaxRequestInfo(handlerVersion, Empty, cont :: Nil, millis))
 
-              Empty
+              Empty // no response available, triggers the actual AJAX computation below
             }
           }