diff --git a/docs/sources/examples/running_ssh_service.md b/docs/sources/examples/running_ssh_service.md
index 864d10c726722f2bf78bd63904b374bd6fd382c6..fc7cd933b2768a1fce8eb476d303b563bda67b18 100644
--- a/docs/sources/examples/running_ssh_service.md
+++ b/docs/sources/examples/running_ssh_service.md
@@ -35,7 +35,7 @@ quick access to a test container.
 
 Build the image using:
 
-    $ sudo docker build -rm -t eg_sshd .
+    $ sudo docker build --rm -t eg_sshd .
 
 Then run it. You can then use `docker port` to find
 out what host port the container's port 22 is mapped to: