--- docker-1.7.1/contrib/init/systemd/docker.service.orig	2015-07-14 21:41:25.000000000 +0300
+++ docker-1.7.1/contrib/init/systemd/docker.service	2016-03-31 23:38:11.461808109 +0300
@@ -5,7 +5,8 @@
 Requires=docker.socket
 
 [Service]
-ExecStart=/usr/bin/docker -d -H fd://
+EnvironmentFile=/etc/default/docker
+ExecStart=/usr/bin/docker -d $DOCKER_OPTS -H fd://
 MountFlags=slave
 LimitNOFILE=1048576
 LimitNPROC=1048576