diff --git a/docs/sources/userguide/dockerimages.md b/docs/sources/userguide/dockerimages.md
index b58be90449..ffcc39ddba 100644
--- a/docs/sources/userguide/dockerimages.md
+++ b/docs/sources/userguide/dockerimages.md
@@ -239,7 +239,7 @@ Let's create a directory and a `Dockerfile` first.
     $ cd sinatra
     $ touch Dockerfile
 
-Each instructions creates a new layer of the image. Let's look at a simple
+Each instruction creates a new layer of the image. Let's look at a simple
 example now for building our own Sinatra image for our development team.
 
     # This is a comment