diff --git a/docs/user/drivers/fs_interface.dox b/docs/user/drivers/fs_interface.dox
index ec891e1afa..edfe0573fe 100644
--- a/docs/user/drivers/fs_interface.dox
+++ b/docs/user/drivers/fs_interface.dox
@@ -325,8 +325,11 @@
 
 	Invoked by the VFS when it is asked to unmount the volume. The function must
 	free all resources associated with the mounted volume, including the volume
-	handle. Although the mount() hook called publish_vnode() for the root node
-	of the volume, unmount() must not invoke put_vnode().
+	handle. Before unmount() is called, the VFS calls
+	file_system_module_info::put_vnode() respectively
+	file_system_module_info::remove_vnode() for each of the volume's nodes. That
+	is although the mount() hook called publish_vnode() for the volume's root
+	node, unmount() must not invoke put_vnode().
 
 	\param volume The volume object.
 	\return \c B_OK if everything went fine, another error code otherwise. The