diff --git a/src/ajax.js b/src/ajax.js
index a868239..716416f 100644
--- a/src/ajax.js
+++ b/src/ajax.js
@@ -260,8 +260,10 @@ Object.extend(Object.extend(Ajax.Updater.prototype, Ajax.Request.prototype), {
     
     if (receiver = $(receiver)) {
       if (options.insertion) {
-        if (typeof options.insertion == 'string')
-          receiver.insert( {}[options.insertion] = response );
+        if (typeof options.insertion == 'string') {
+          var insertion = {}; insertion[options.insertion] = response;
+          receiver.insert(insertion);
+        }
         else options.insertion(receiver, response);
       } 
       else receiver.update(response);
diff --git a/test/unit/ajax.html b/test/unit/ajax.html
index 8218be0..100bf70 100644
--- a/test/unit/ajax.html
+++ b/test/unit/ajax.html
@@ -107,6 +107,12 @@
         new Ajax.Updater("content", "fixtures/content.html", { method:'get', insertion: 'bottom' });      
         wait(1000,function(){
           assertEqual(sentence, $("content").innerHTML.strip().toLowerCase());
+          
+          $('content').update();
+          new Ajax.Updater("content", "fixtures/content.html", { method:'get', insertion: 'after' });      
+          wait(1000,function(){
+            assertEqual('five dozen', $("content").next().innerHTML.strip().toLowerCase());
+          });
         });
       });
     }},