diff --git a/README.md b/README.md
index 15bf5c6..b0bdbcb 100644
--- a/README.md
+++ b/README.md
@@ -16,7 +16,7 @@ The answer is yes. The implementation uses only built-in Emacs file operations:
 olliesrv start
 ```
 
-By default the server mounts at `~/mnt/ollie`. Set `OLLIE_9MOUNT` to use a different path.
+By default the server mounts at `~/mnt/ollie`. Set `OLLIE` to use a different path.
 
 ## Installation
 
diff --git a/ollie.el b/ollie.el
index a7dda92..57aedb9 100644
--- a/ollie.el
+++ b/ollie.el
@@ -7,7 +7,7 @@
 ;;; Commentary:
 ;;
 ;; ollie.el talks to an ollie-9p session through plain file I/O on the
-;; mounted filesystem (default: ~/mnt/ollie, or $OLLIE_9MOUNT).
+;; mounted filesystem (default: ~/mnt/ollie, or $OLLIE).
 ;;
 ;; Quick start:
 ;;
@@ -50,7 +50,7 @@
   :prefix "ollie-")
 
 (defcustom ollie-mount-directory
-  (or (getenv "OLLIE_9MOUNT") (expand-file-name "~/mnt/ollie"))
+  (or (getenv "OLLIE") (expand-file-name "~/mnt/ollie"))
   "Mount point for the ollie-9p filesystem."
   :type 'directory
   :group 'ollie)