diff --git a/spec/custom/index.html b/spec/custom/index.html
index c0c33fcd..e11e6b30 100644
--- a/spec/custom/index.html
+++ b/spec/custom/index.html
@@ -328,7 +328,7 @@ Types of Callbacks
This callback is invoked after custom element instance is created and its definition is registered. The actual timing of this callback is defined further in this specification.
The custom element prototype must be set just prior to invoking callback.
For the duration of this callback invocation, the element is being created flag must be set to true. In all other cases, the flag must be set to false.
- All other callbacks must not be enqueued until after the created callback's invocation had started.
+ If the created callback exists for an element, all other callbacks must not be enqueued until after this created callback's invocation had started.
attached
Unless specified otherwise, this callback must be enqueued whenever custom element is inserted into a document and this document has a browsing context.
detached