diff --git a/sdk_container/src/third_party/coreos-overlay/app-emulation/docker/files/docker.service b/sdk_container/src/third_party/coreos-overlay/app-emulation/docker/files/docker.service
index 2d27d2a227..dd34cda8d5 100644
--- a/sdk_container/src/third_party/coreos-overlay/app-emulation/docker/files/docker.service
+++ b/sdk_container/src/third_party/coreos-overlay/app-emulation/docker/files/docker.service
@@ -5,7 +5,6 @@ After=docker.socket early-docker.target network.target
 Requires=docker.socket early-docker.target
 
 [Service]
-Environment=TMPDIR=/var/tmp
 EnvironmentFile=-/run/flannel_docker_opts.env
 MountFlags=slave
 LimitNOFILE=1048576