diff --git a/docs/contributing/implementation-notes.md b/docs/contributing/implementation-notes.md
index 489a07f9fc0c2..a50bc0c9656d0 100644
--- a/docs/contributing/implementation-notes.md
+++ b/docs/contributing/implementation-notes.md
@@ -749,7 +749,7 @@ We collect DOM operations on children in a list so we can execute them in batch:
       // If we can't update an existing instance, we have to unmount it
       // and mount a new one instead of it.
       if (!canUpdate) {
-        var prevNode = prevChild.node;
+        var prevNode = prevChild.getHostNode();
         prevChild.unmount();
 
         var nextChild = instantiateComponent(nextChildren[i]);