diff --git a/apidoc/index.md b/apidoc/index.md
index 5ac6d8ccc9..92cfa13eda 100644
--- a/apidoc/index.md
+++ b/apidoc/index.md
@@ -30,7 +30,7 @@ Interactions for [vector features](ol.Feature.html)
[Formats](ol.format.Feature.html) for reading/writing vector data
[ol.format.WMSCapabilities](ol.format.WMSCapabilities.html)
All coordinates and extents need to be provided in view projection (default: EPSG:3857). To transform, use [ol.proj.transform()](ol.proj.html#transform) and [ol.extent.applyTransform()](ol.extent.html#applyTransform).
+All coordinates and extents need to be provided in view projection (default: EPSG:3857). To transform, use [ol.proj.transform()](ol.proj.html#transform) and [ol.proj.transformExtent()](ol.proj.html#transformExtent).
[ol.proj](ol.proj.html)[Objects](ol.Object.html) can be kept in sync using the [bindTo()](ol.Object.html#bindTo) method.
A [DOM Input](ol.dom.Input.html) class is available to bind Object properties to HTML Input elements.