diff --git a/contrib/completion/zsh/_docker b/contrib/completion/zsh/_docker
index 4603aacbd4..8393e254fb 100644
--- a/contrib/completion/zsh/_docker
+++ b/contrib/completion/zsh/_docker
@@ -452,6 +452,7 @@ __docker_subcommand() {
                 "($help)--log-driver=-[Default driver for container logs]:Logging driver:(json-file syslog journald gelf fluentd awslogs none)" \
                 "($help)*--log-opt=-[Log driver specific options]:log driver options: " \
                 "($help)--mtu=-[Set the containers network MTU]:mtu:(0 576 1420 1500 9000)" \
+                "($help)--no-legacy-registry[Do not contact legacy registries]" \
                 "($help -p --pidfile)"{-p,--pidfile=-}"[Path to use for daemon PID file]:PID file:_files" \
                 "($help)*--registry-mirror=-[Preferred Docker registry mirror]:registry mirror: " \
                 "($help -s --storage-driver)"{-s,--storage-driver=-}"[Storage driver to use]:driver:(aufs devicemapper btrfs zfs overlay)" \