diff --git a/storage/volumes.md b/storage/volumes.md
index f1eb56c416..2389740d7f 100644
--- a/storage/volumes.md
+++ b/storage/volumes.md
@@ -494,7 +494,7 @@ $ docker service create -d \
 
 #### NFSv4
 ```console
-docker service create -d \
+$ docker service create -d \
     --name nfs-service \
     --mount 'type=volume,source=nfsvolume,target=/app,volume-driver=local,volume-opt=type=nfs,volume-opt=device=:/var/docker-nfs,"volume-opt=o=addr=10.0.0.10,rw,nfsvers=4,async"' \
     nginx:latest