diff --git a/docker/run/fs/exe/initialize.sh b/docker/run/fs/exe/initialize.sh
index 8c329bb304..b1720b7bc6 100644
--- a/docker/run/fs/exe/initialize.sh
+++ b/docker/run/fs/exe/initialize.sh
@@ -19,5 +19,10 @@ chmod 444 /root/.profile
 # update package list to save time later
 apt-get update > /dev/null 2>&1 &
 
+# Honor a docker environment supplied UMASK
+if [ -n "$UMASK" ]; then
+    umask "$UMASK"
+fi
+
 # let supervisord handle the services
 exec /usr/bin/supervisord -c /etc/supervisor/conf.d/supervisord.conf