diff --git a/iron-list.html b/iron-list.html
index 111e6ae2..9674fee5 100644
--- a/iron-list.html
+++ b/iron-list.html
@@ -1301,6 +1301,7 @@
           el.removeAttribute('hidden');
         } else {
           inst.__key__ = null;
+          inst[this.as] = null;
           el.setAttribute('hidden', '');
         }
       }, itemSet);