diff --git a/contrib/init/sysvinit-debian/docker.default b/contrib/init/sysvinit-debian/docker.default
index c7dc9a2a7f..e217d7995e 100644
--- a/contrib/init/sysvinit-debian/docker.default
+++ b/contrib/init/sysvinit-debian/docker.default
@@ -17,4 +17,4 @@
 #export http_proxy="http://127.0.0.1:3128/"
 
 # This is also a handy place to tweak where Docker's temporary files go.
-#export TMPDIR="/mnt/bigdrive/docker-tmp"
+#export DOCKER_TMPDIR="/mnt/bigdrive/docker-tmp"