diff --git a/doc/api/n-api.md b/doc/api/n-api.md
index 3d1741bad82359..709b080649fde9 100644
--- a/doc/api/n-api.md
+++ b/doc/api/n-api.md
@@ -5119,6 +5119,11 @@ invocation. If it is deleted before then, then the finalize callback may never
 be invoked. Therefore, when obtaining a reference a finalize callback is also
 required in order to enable correct disposal of the reference.
 
+Finalizer callbacks may be deferred, leaving a window where the object has
+been garbage collected (and the weak reference is invalid) but the finalizer
+hasn't been called yet. When using `napi_get_reference_value()` on weak
+references returned by `napi_wrap()`, you should still handle an empty result.
+
 Calling `napi_wrap()` a second time on an object will return an error. To
 associate another native instance with the object, use `napi_remove_wrap()`
 first.