diff --git a/maven-embedder/src/site/apt/index.apt.vm b/maven-embedder/src/site/apt/index.apt.vm
index 4df712cff1..519fdae26e 100644
--- a/maven-embedder/src/site/apt/index.apt.vm
+++ b/maven-embedder/src/site/apt/index.apt.vm
@@ -37,4 +37,6 @@ ${project.name}
 
    * <<<.mvn/jvm.config>>> containing jvm options,
 
-   * <<<.mvn/maven.config>>> containing Maven command-line parameter.
+   * <<<.mvn/maven.config>>> containing Maven command-line parameter,
+
+   * <<<.mvn/extensions.xml>>> containing {{{./core-extensions.html}a list of extensions}}.