diff --git a/contrib/man/md/docker-build.1.md b/contrib/man/md/docker-build.1.md
index 679dc577c4..b3e9a2842e 100644
--- a/contrib/man/md/docker-build.1.md
+++ b/contrib/man/md/docker-build.1.md
@@ -5,8 +5,8 @@
 docker-build - Build a container image from a Dockerfile source at PATH
 
 # SYNOPSIS
-**docker build** [**--no-cache**[=*false*] [**-q**|**--quiet**[=*false*]
- [**-rm**] [**-t**|**--tag**=*tag*] PATH | URL | -
+**docker build** [**--no-cache**[=*false*]] [**-q**|**--quiet**[=*false*]]
+ [**--rm**] [**-t**|**--tag**=TAG] PATH | URL | -
 
 # DESCRIPTION
 This will read the Dockerfile from the directory specified in **PATH**.