diff --git a/docs.it4i/general/accessing-the-clusters/graphical-user-interface/x-window-system.md b/docs.it4i/general/accessing-the-clusters/graphical-user-interface/x-window-system.md
index 5516a90b0e9a07383a4a3e67a6f7a209deadef4a..9b353bf999ee8246b6c87620cbecc3d5b34ded14 100644
--- a/docs.it4i/general/accessing-the-clusters/graphical-user-interface/x-window-system.md
+++ b/docs.it4i/general/accessing-the-clusters/graphical-user-interface/x-window-system.md
@@ -9,7 +9,7 @@ The X Window system is a principal way to get GUI access to the clusters. The **
 
 ### Linux Example
 
-In order to display the GUI of various software tools, you need to enable the X display forwarding. On Linux and Mac, log in using the -X option in the SSH client:
+In order to display the GUI of various software tools, you need to enable the X display forwarding. On Linux and Mac, log in using the `-X` option in the SSH client:
 
 ```console
  local $ ssh -X username@cluster-name.it4i.cz