diff --git a/Installing-tracks-2.2-from-Docker-Index.md b/Installing-tracks-2.2-from-Docker-Index.md
index 8228ae6..2f04d9c 100644
--- a/Installing-tracks-2.2-from-Docker-Index.md
+++ b/Installing-tracks-2.2-from-Docker-Index.md
@@ -18,7 +18,7 @@ When the image has finished downloading, you can verify that it is available by
 
 Now you can start Tracks on port 8080 on your host simply by issuing the following command:
 
-`docker run -d -p 8080:3000 <IMAGE ID>`
+`root@docker# docker run -d -p 8080:3000 <IMAGE ID>`
 
 or a more extensive version: