diff --git a/supervisord.conf b/supervisord.conf
index 7a06128..7c49f7f 100644
--- a/supervisord.conf
+++ b/supervisord.conf
@@ -38,7 +38,6 @@ priority=1
 
 [program:dockerd]
 command=bash -c "/usr/bin/dockerd ${DOCKERD_FLAG}"
-environment=DOCKERD_FLAG="%(ENV_DOCKERD_FLAG)s"
 stdout_logfile=/tmp/dockerd.log
 stdout_logfile_maxbytes=5MB
 stdout_logfile_backups=0