diff --git a/docs/reference/setup/install/docker.asciidoc b/docs/reference/setup/install/docker.asciidoc
index 83f80b569a8..9d03edb9e7e 100644
--- a/docs/reference/setup/install/docker.asciidoc
+++ b/docs/reference/setup/install/docker.asciidoc
@@ -82,7 +82,7 @@ The `vm.max_map_count` setting should be set permanently in `/etc/sysctl.conf`:
 --------------------------------------------
 $ grep vm.max_map_count /etc/sysctl.conf
 vm.max_map_count=262144
-----------------------------------
+--------------------------------------------
 
 To apply the setting on a live system type: `sysctl -w vm.max_map_count=262144`
 --