diff --git a/README.md b/README.md
index d6d45e198..2f723b741 100644
--- a/README.md
+++ b/README.md
@@ -7,3 +7,9 @@ Requires GNU `make`, GNU `tar` (not Busybox tar), Docker to build.
 - 1.12.x branch for Desktop stable 1.12 edition
 - 1.13.x branch for Desktop and Cloud 1.13; also supports 1.12 CS.
 - master for 1.14 development
+
+Several kernel variants are supported:
+- default
+- `make LTS4.4=1` 4.4 LTS series
+- `make AUFS=1` supports AUFS (deprecated)
+- `make AUFS4.4=1` 4.4 LTS series with AUFS (deprecated)