diff --git a/docs/api/virtualizer.md b/docs/api/virtualizer.md
index 176702d0..a73e61be 100644
--- a/docs/api/virtualizer.md
+++ b/docs/api/virtualizer.md
@@ -26,7 +26,7 @@ The total number of items to virtualize.
 getScrollElement: () => TScrollElement
 ```
 
-A function that returns the scrollable element for the virtualizer. It may return undefined if the element is not available yet.
+A function that returns the scrollable element for the virtualizer. It may return null if the element is not available yet.
 
 ### `estimateSize`