diff --git a/docs/docs/systems/form/model-value.md b/docs/docs/systems/form/model-value.md
index 4e8d62a94..ae471a5db 100644
--- a/docs/docs/systems/form/model-value.md
+++ b/docs/docs/systems/form/model-value.md
@@ -32,3 +32,4 @@ For more information about parsing and the Unparseable type, see [Formatting and
 - `formPath`: an array of FormControls. It contains the path an event follows to go from a 'leaf
   element' (for instance a lion-input) to a top element (for instance lion-form). An example path
   could be [lionForm, lionFieldset, lionInput]
+- `initialize`: whether this is the first time the event is fired (on first render of the FormControl)