diff --git a/docs/reference/envvars.md b/docs/reference/envvars.md
index e1170be90..6f7fb7919 100644
--- a/docs/reference/envvars.md
+++ b/docs/reference/envvars.md
@@ -17,6 +17,9 @@ Several environment variables are available for you to configure the Docker Comp
 Variables starting with `DOCKER_` are the same as those used to configure the
 Docker command-line client. If you're using `docker-machine`, then the `eval "$(docker-machine env my-docker-vm)"` command should set them to their correct values. (In this example, `my-docker-vm` is the name of a machine you created.)
 
+> Note: Some of these variables can also be provided using an
+> [environment file](../env-file.md)
+
 ## COMPOSE\_PROJECT\_NAME
 
 Sets the project name. This value is prepended along with the service name to the container container on start up. For example, if you project name is `myapp` and it includes two services `db` and `web` then compose starts containers named  `myapp_db_1` and `myapp_web_1` respectively.
@@ -81,3 +84,4 @@ it failed. Defaults to 60 seconds.
 - [User guide](../index.md)
 - [Installing Compose](../install.md)
 - [Compose file reference](../compose-file.md)
+- [Environment file](../env-file.md)