diff --git a/docs/reference/commandline/dockerd.md b/docs/reference/commandline/dockerd.md
index a8a3cf2dee..b8d86360a8 100644
--- a/docs/reference/commandline/dockerd.md
+++ b/docs/reference/commandline/dockerd.md
@@ -130,8 +130,6 @@ For easy reference, the following list of environment variables are supported
 by the `dockerd` command line:
 
 * `DOCKER_DRIVER` The graph driver to use.
-* `DOCKER_NOWARN_KERNEL_VERSION` Prevent warnings that your Linux kernel is
-  unsuitable for Docker.
 * `DOCKER_RAMDISK` If set this will disable 'pivot_root'.
 * `DOCKER_TMPDIR` Location for temporary Docker files.
 * `MOBY_DISABLE_PIGZ` Do not use [`unpigz`](https://linux.die.net/man/1/pigz) to